Sura al-Anʿām 6:20

ٱلَّذِينَ ءَاتَيْنَٰهُمُ ٱلْكِتَٰبَ يَعْرِفُونَهُۥ كَمَا يَعْرِفُونَ أَبْنَآءَهُمُ ٱلَّذِينَ خَسِرُوٓا۟ أَنفُسَهُمْ فَهُمْ لَا يُؤْمِنُونَ

lladhīna ātaynāhumu l-kitāba yaʿrifūnahu ka-mā yaʿrifūna abnāʾahumu lladhīna khasirū anfusahum fa-hum lā yuʾminūna

Those to whom We have given the Book know this as they know their own sons. Those who have lost their own souls refuse therefore to believe.