At Tawbah, 113 Ayah
9:113
مَا كَانَ لِلنَّبِيِّ وَٱلَّذِينَ ءَامَنُوٓاْ أَن يَسۡتَغۡفِرُواْ لِلۡمُشۡرِكِينَ وَلَوۡ كَانُوٓاْ أُوْلِي قُرۡبَىٰ مِنۢ بَعۡدِ مَا تَبَيَّنَ لَهُمۡ أَنَّهُمۡ أَصۡحَٰبُ ٱلۡجَحِيمِ ١١٣
Mā Kāna Lilnnabīyi Wa Al-Ladhīna 'Āmanū 'An Yastaghfirū Lilmushrikīna Wa Law Kānū 'Ūlī Qurbá Min Ba`di Mā Tabayyana Lahum 'Annahum 'Aşĥābu Al-Jaĥīmi
It is not for the Prophet and those who have believed to ask forgiveness for the polytheists, even if they were relatives, after it has become clear to them that they are companions of Hellfire.