وَمَا And not كَانَ was ٱسْتِغْفَارُ (the) asking of forgiveness إِبْرَٰهِيمَ (by) Ibrahim لِأَبِيهِ for his father إِلَّا except عَن because مَّوْعِدَةٍۢ (of) a promise وَعَدَهَآ he had promised it إِيَّاهُ (to) him فَلَمَّا But when تَبَيَّنَ it became clear لَهُۥٓ to him أَنَّهُۥ that he عَدُوٌّۭ (was) an enemy لِّلَّهِ to Allah تَبَرَّأَ he disassociated مِنْهُ ۚ from him إِنَّ Indeed إِبْرَٰهِيمَ Ibrahim لَأَوَّٰهٌ (was) compassionate حَلِيمٌۭ forbearing ١١٤
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 him [i.e., Abraham] that he [i.e., the father] was an enemy to Allāh, he disassociated himself from him. Indeed was Abraham compassionate and patient.
— Come To Light