Surah At-Tawbah 9:113

مَا كَانَ لِلنَّبِىِّ وَٱلَّذِينَ ءَامَنُوٓا۟ أَن يَسْتَغْفِرُوا۟ لِلْمُشْرِكِينَ وَلَوْ كَانُوٓا۟ أُو۟لِى قُرْبَىٰ مِنۢ بَعْدِ مَا تَبَيَّنَ لَهُمْ أَنَّهُمْ أَصْحَـٰبُ ٱلْجَحِيمِ

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.

Translation: Saheeh International

Tafsir

The following was revealed regarding the Prophet s asking forgiveness for his uncle Abū Tālib and some of the Companions asking forgiveness for their idolatrous parents It is not for the Prophet and those who believe to ask forgiveness for the idolaters even though they be kinsmen relatives after it has become clear …

Excerpt from Tafsir al-Jalalayn, commentary on 9:113, via Quran.com. The reader has the full commentary and 9 more tafsirs.