(2:143) And thus we have made you a just community that you will be witnesses over the people and the Messenger will be a witness over you. And We did not make the qiblah which you used to face except that We might make evident who would follow the Messenger from who would turn back on his heels. And indeed, it is difficult except for those whom Allah has guided. And never would Allah have caused you to lose your faith. Indeed Allah is, to the people, Kind and Merciful.
Muhammad Taqi-ud-Din al-Hilali and Muhammad Muhsin Khan,
(2:143) Thus We have made you [true Muslims – real believers of Islamic Monotheism, true followers of Prophet Muhammad SAW and his Sunnah (legal ways)], a Wasat (just) (and the best) nation, that you be witnesses over mankind and the Messenger (Muhammad SAW) be a witness over you. And We made the Qiblah (prayer direction towards Jerusalem) which you used to face, only to test those who followed the Messenger (Muhammad SAW) from those who would turn on their heels (i.e. disobey the Messenger). Indeed it was great (heavy) except for those whom Allah guided. And Allah would never make your faith (prayers) to be lost (i.e. your prayers offered towards Jerusalem). Truly, Allah is full of kindness, the Most Merciful towards mankind.
Mohammed Marmaduke William Pickthall
(2:143) Thus We have appointed you a middle nation, that ye may be witnesses against mankind, and that the messenger may be a witness against you. And We appointed the qiblah which ye formerly observed only that We might know him who followeth the messenger, from him who turneth on his heels. In truth it was a hard (test) save for those whom Allah guided. But it was not Allah’s purpose that your faith should be in vain, for Allah is Full of Pity, Merciful toward mankind.
Abdullah Yusuf Ali
(2:143) Thus, have We made of you an Ummat justly balanced, that ye might be witnesses over the nations, and the Messenger a witness over yourselves; and We appointed the Qibla to which thou wast used, only to test those who followed the Messenger from those who would turn on their heels (From the Faith). Indeed it was (A change) momentous, except to those guided by Allah. And never would Allah Make your faith of no effect. For Allah is to all people Most surely full of kindness, Most Merciful.
Mohammad Habib Shakir
(2:143) And thus We have made you a medium (just) nation that you may be the bearers of witness to the people and (that) the Apostle may be a bearer of witness to you; and We did not make that which you would have to be the qiblah but that We might distinguish him who follows the Apostle from him who turns back upon his heels, and this was surely hard except for those whom Allah has guided aright; and Allah was not going to make your faith to be fruitless; most surely Allah is Affectionate, Merciful to the people.
Dr. Ghali
(2:143) And thus We have made you a middle nation to be witnesses over mankind, and (for) the Messenger to be a witness over you. And in no way did We make the Qiblah which you had been (facing), except that We should know who closely followed the Messenger from him who turned over on his heels. And decidedly it was indeed a great thing (i.e. Formidable, hard) except for the ones whom Allah has guided, and in no way will Allah indeed waste your belief. Surely Allah is indeed Ever-Compassionate, Ever-Merciful to mankind.
Ali Unal
(2:143) And in that way (O Community of Muhammad! whereas others turn in different directions and, straying from the Straight Path, falter between extremes in thought and belief) We have made you a middle-way community, that you may be witnesses for the people (as to the ways they follow), and that the (most noble) Messenger may be a witness for you. We formerly appointed (the Bayt al-Maqdis in Jerusalem) the direction to turn in the Prayer (and now are about to change it) so that We may determine who truly follows the Messenger from him who turns back on his heels (when the Messengers way does not suit his desires). And indeed that testing was burdensome, save for those whom God has guided (and made steadfast in faith). God will never let your faith go to waste. Surely God is for the people All-Pitying, All-Compassionate.
Amatul Rahman Omar
(2:143) And thus have We made you a nation exalted and justly balanced so that you may be a guiding example for all mankind (by carrying to them what you have learnt about Islam), and this perfect Messenger (of God) may be a guiding example for you. And We did not make that which you would have to be the Qiblah but that We might distinguish him who follows the Messenger from him who turns upon his heels. And this (change of Qiblah) is indeed a hard (test) except for those whom Allâh has guided aright. It was not Allâh´s purpose that your faith and your worship should go in vain. Surely, Allâh is Compassionate and Ever Merciful to the people.
Literal
(2:143) And like that We made you a moderate/reasonable nation to be witnesses on the people, and the messenger be (a) witness on you, and We did not make the (prayer) direction that you were on it, except to know who follows the messenger from who returns on his two heels , and that truly (was) big/great (E) except on those who God guided, and God was not to waste your faith/belief, that God (is) with the people merciful/compassionate (E) , most merciful .
Ahmed Ali
(2:143) We have made you a temperate people that you act as witness over man, and the Prophet as witness over you. We decreed the Qiblah which you faced before that We may know who follow the Apostle and who turn away in haste. And this was a hard (test) except for those who were guided by God. But God will not suffer your faith to go waste, for God is to men full of mercy and grace.
A. J. Arberry
(2:143) Thus We appointed you a midmost nation that you might be witnesses to the people, and that the Messenger might be a witness to you; and We did not appoint the direction thou wast facing, except that We might know who followed the Messenger from him who turned on his heels — though it were a grave thing save for those whom God has guided; but God would never leave your faith to waste – truly, God is All-gentle with the people, All-compassionate.
Abdul Majid Daryabadi
(2:143) And in this wise We have made you a community justly balanced, that ye may be witness against the man kind and that the apostle may be in regard to you a witness. And We appointed not the Qiblah which thou hast had save in order that We might know him who followeth the apostle from him who turnoth back upon his heels. And of a surety the change is grievous save unto those whom Allah hath guided. And Allah is not one to let your faith go wasted; verily Allah is unto mankind Tender, Merciful.
Maulana Mohammad Ali
(2:143)-
Muhammad Sarwar
(2:143) We have made you (true Muslims) a moderate nation so that you could be an example for all people and the Prophet an example for you. The direction which you had been facing during your prayers (the qibla) was only made in order that We would know who would follow the Messenger and who would turn away. It was a hard test but not for those to whom God has given guidance. God did not want to make your previous prayers worthless; God is Compassionate and All-merciful.
Hamid Abdul Aziz
(2:143) Thus have We made you a middle (or justly balanced) nation, to be witnesses against men, and that the Apostle may be a witness against you. We have not appointed the Qiblah (direction, focus, goal) which you were used to, save that We might know (test) who follows the Apostle from him who turns upon his heels, although it is a great thing save for those whom Allah does guide. But Allah will not waste your faith, for verily, Allah is to all people full of Kindness, Most Merciful.
Faridul Haque
(2:143) And so it is that We have made you the best nation* for you are witnesses** against mankind, and the Noble Messenger is your guardian and your witness
Talal Itani
(2:143) Thus We made you a moderate community, that you may be witnesses to humanity, and that the Messenger may be a witness to you. We only established the direction of prayer, which you once followed, that We may distinguish those who follow the Messenger from those who turn on their heels. It is indeed difficult, except for those whom God has guided. But God would never let your faith go to waste. God is Kind towards the people, Merciful.
Ahmed Raza Khan
(2:143) And so it is that We have made you the best nation* for you are witnesses** against mankind, and the Noble Messenger is your guardian and your witness; and (O dear Prophet Mohammed peace and blessings be upon him) We had appointed the qiblah which you formerly observed only to see (test) who follows the Noble Messenger, and who turns away; and it was indeed hard except for those whom Allah guided; and it does not befit Allahs Majesty to waste your faith! Indeed Allah is Most Compassionate, Most Merciful towards mankind. (* The best Ummah is that of Prophet Mohammed peace and blessings be upon him. ** The Holy Prophet is a witness from Allah.)
Wahiduddin Khan
(2:143) Thus We have made you a middle nation, so that you may act as witnesses for mankind, and the Messenger may be a witness for you. We decreed your former prayer direction towards which you used to face only in order that We might make a clear distinction between the Messenger’s true followers and those who were to turn their backs on him. This was indeed a hard test for all but those whom God has guided. God will never let your faith go to waste. God is compassionate and merciful to mankind.
Safi-ur-Rahman al-Mubarakpuri
(2:143) Thus We have made you [true Muslims ? real believers of Islamic Monotheism, true followers of Prophet Muhammad and his Sunnah (legal ways)], a Wasat (just and the best) nation, that you be witnesses over mankind and the Messenger (Muhammad) be a witness over you. And We made the Qiblah which you used to face, only to test those who followed the Messenger (Muhammad) from those who would turn on their heels (i.e; disobey the Messenger). Indeed it was great (heavy, difficult) except for those whom Allah guided. And Allah would never make your faith (prayers) to be lost (i.e; your prayers offered towards Jerusalem). Truly, Allah is full of kindness, the Most Merciful towards mankind.
Ali Quli Qarai
(2:143) Thus We have made you a middle nation that you may be witnesses to the people, and that the Apostle may be a witness to you. We did not appoint the qiblah you were following, but that We may ascertain those who follow the Apostle from those who turn back on their heels. It was indeed a hard thing except for those whom Allah has guided. And Allah would not let your prayers go to waste. Indeed Allah is most kind and merciful to mankind.
Hasan al-Fatih Qaribullah and Ahmad Darwish
(2:143) And so We have made you a median nation, in order that you will be a witness above the people, and that the Messenger be a witness above you. We did not change the direction that you were facing except that We might know who followed the Messenger from him who turned on both his heels. Though it was a hardship except for those whom Allah has guided. But Allah would never waste your faith. Indeed, Allah is Gentle with people, the Most Merciful.
That is translated surah Al Baqarah ayat 143 (QS 2: 143) in arabic and english text, may be useful.