مَا كَانَ لِلنَّبِيِّ وَالَّذِينَ آمَنُواْ أَن يَسْتَغْفِرُواْ لِلْمُشْرِكِينَ وَلَوْ كَانُواْ أُوْلِي قُرْبَى مِن بَعْدِ مَا تَبَيَّنَ لَهُمْ أَنَّهُمْ أَصْحَابُ الْجَحِيمِ
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سورة التوبة
(9/113) It is not for the Prophet and those who believe to ask for the forgiveness of the associators, although they be of kin after it hath become manifest unto them that they are the fellows of the Flaming Fire.
Surah At-Tawbah