Sura al-Tawbah 9:84

وَلَا تُصَلِّ عَلَىٰٓ أَحَدٍ مِّنْهُم مَّاتَ أَبَدًا وَلَا تَقُمْ عَلَىٰ قَبْرِهِۦٓ إِنَّهُمْ كَفَرُوا۟ بِٱللَّـهِ وَرَسُولِهِۦ وَمَاتُوا۟ وَهُمْ فَٰسِقُونَ

wa-lā tuṣalli ʿala aḥadin minhum māta abadan wa-lā taqum ʿalā qabrihi innahum kafarū billāhi wa-rasūlihi wa-mātū wa-hum fāsiqūna

Nor do thou ever pray for any of them that dies, nor stand at his grave; for they rejected Allah and His Messenger, and died in a state of perverse rebellion.