(18:44) There the authority is [completely] for Allah, the Truth. He is best in reward and best in outcome.
Muhammad Taqi-ud-Din al-Hilali and Muhammad Muhsin Khan,
(18:44) There (on the Day of Resurrection), Al-Walayah (the protection, power, authority and kingdom) will be for Allah (Alone), the True God. He (Allah) is the Best for reward and the Best for the final end. (La ilaha ill-Allah none has the right to be worshipped but Allah).
Mohammed Marmaduke William Pickthall
(18:44) In this case is protection only from Allah, the True, He is Best for reward, and best for consequence.
Abdullah Yusuf Ali
(18:44) There, the (only) protection comes from Allah, the True One. He is the Best to reward, and the Best to give success.
Mohammad Habib Shakir
(18:44) Here is protection only Allah’s, the True One; He is best in (the giving of) reward and best in requiting.
(18:44) There over patronage belongs (only) to Allah, The Truth; He is The Most Charitable for requital, and The Most Charitable for consequence.
(18:44) For thus it is: all power to protect belongs to God, the True. He is the best for reward, and the best for the outcome.
Amatul Rahman Omar
(18:44) At such a time (it is thus established that) protection belongs only to Allâh (and help comes from Him alone), the true (God), He is the Best in respect of rewarding and the Best in respect of bringing about good results.
(18:44) At that place and time the ownership/might (is) to God, the truth , He is (the) best (in) reward/replacement/compensation and best (in) an end.
(18:44) The jurisdiction in this province belongs to God. His is the best reward, and His the best requital.
A. J. Arberry
(18:44) Thereover protection belongs only to God the True; He is best rewarding, best in the issue.
Abdul Majid Daryabadi
(18:44) Herein is all protection from Allah the True: He is excellent in respect of reward and excellent in respect of the final end!
Maulana Mohammad Ali
(18:44) In such helplessness, the human being realizes that it is God who is the true Guardian and His rewards and recompense are the best.
Hamid Abdul Aziz
(18:44) And he had no troop of men to help him against Allah, nor could he save himself.
(18:44) Here brought to light is that the authority is only for Allah, the True
(18:44) That is because authority belongs to God, the True. He is Best in rewarding, and Best in requiting.
Ahmed Raza Khan
(18:44) Here brought to light is that the authority is only for Allah, the True; the reward He bestows is the best, and believing in Him has the best outcome.
(18:44) The only support is from God, the True God. He is the best in rewarding and the best in respect of the final outcome.
(18:44) There (on the Day of Resurrection), Al-Walayah will be for Allah (Alone), the True God. He (Allah) is the best for reward and the best for the final end.
Ali Quli Qarai
(18:44) There, all authority belongs to Allah, the Real. He is best in rewarding, and best in requiting.
Hasan al-Fatih Qaribullah and Ahmad Darwish
(18:44) that Day. Supremacy belongs only to Allah, the True. He is the best to reward and the best ending.
That is translated surah Al kahf ayat 44 (QS 18: 44) in arabic and english text, may be useful.