Quran english at taubah 114

وما كان استغفار إبراهيم لأبيه إلا عن موعدة وعدها إياه فلما تبين له أنه عدو لله تبرأ منه إن إبراهيم لأواه حليم

Wama kana istighfaruibraheema li-abeehi illa AAan mawAAidatin waAAadahaiyyahu falamma tabayyana lahu annahu AAaduwwun lillahitabarraa minhu inna ibraheema laawwahun haleem

 
Sahih International
And the request of forgiveness of Abraham for his father was only because of a promise he had made to him. But when it became apparent to Abraham that his father was an enemy to Allah , he disassociated himself from him. Indeed was Abraham compassionate and patient.
Muhsin Khan
And [Ibrahim’s (Abraham)] invoking (of Allah) for his father’s forgiveness was only because of a promise he [Ibrahim (Abraham)] had made to him (his father). But when it became clear to him [Ibrahim (Abraham)] that he (his father) is an enemy to Allah, he dissociated himself from him. Verily Ibrahim (Abraham) was Al-Awwah (has fifteen different meanings but the correct one seems to be that he used to invoke Allah with humility, glorify Him and remember Him much), and was forbearing. (Tafsir Al-Qurtubi).
Pickthall
The prayer of Abraham for the forgiveness of his father was only because of a promise he had promised him, but when it had become clear unto him that he (his father) was an enemy to Allah he (Abraham) disowned him. Lo! Abraham was soft of heart, long-suffering.
Yusuf Ali
And Abraham prayed for his father’s forgiveness only because of a promise he had made to him. But when it became clear to him that he was an enemy to Allah, he dissociated himself from him: for Abraham was most tender-hearted, forbearing.
Shakir
And Ibrahim asking forgiveness for his sire was only owing to a promise which he had made to him; but when it became clear to him that he was an enemy of Allah, he declared himself to be clear of him; most surely Ibrahim was very tender-hearted forbearing.
Dr. Ghali
And in no way was Ibrahim’s (Abraham’s) asking forgiveness for his father (for any reason) except for a commitment he had promised him; so, as soon as it became evident to him that he was an enemy of Allah, he declared himself quit of him; surely Ibrahim was indeed most plaintive, constantly forbearing.