At-Tawbah 9:114

وَمَا كَانَ ٱسۡتِغۡفَارُ إِبۡرَٰهِيمَ لِأَبِيهِ إِلَّا عَن مَّوۡعِدَةٖ وَعَدَهَآ إِيَّاهُ فَلَمَّا تَبَيَّنَ لَهُۥٓ أَنَّهُۥ عَدُوّٞ لِّلَّهِ تَبَرَّأَ مِنۡهُۚ إِنَّ إِبۡرَٰهِيمَ لَأَوَّـٰهٌ حَلِيمٞ 114

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