(Asshuara’) 26 : 86
وَاغْفِرْ لِأَبِي إِنَّهُ كَانَ مِنَ الضَّالِّينَ

"You Forgive my father, for he is among the strayed”.

See explanation 3: 90; 9: 113- 114 and 15: 56.