9:113
مَا كَانَ لِلنَّبِىِّ وَٱلَّذِينَ ءَامَنُوٓا۟ أَن يَسْتَغْفِرُوا۟ لِلْمُشْرِكِينَ وَلَوْ كَانُوٓا۟ أُو۟لِى قُرْبَىٰ مِنۢ بَعْدِ مَا تَبَيَّنَ لَهُمْ أَنَّهُمْ أَصْحَـٰبُ ٱلْجَحِيمِ
9:113
It is not (proper) for the Prophet and those who believe to ask Allah's Forgiveness for the Mushrikun (polytheists, idolaters, pagans, disbelievers in the Oneness of Allah) even though they be of kin, after it has become clear to them that they are the dwellers of the Fire (because they died in a state of disbelief). - Muhammad Taqi-ud-Din al-Hilali and Muhammad Muhsin Khan (English)