Surah Yusuf, Verse 38:
وَاتَّبَعْتُ مِلَّةَ آبَائِي إِبْرَاهِيمَ وَإِسْحَاقَ وَيَعْقُوبَ مَا كَانَ لَنَا أَن نُّشْرِكَ بِاللَّهِ مِن شَيْءٍ ذَٰلِكَ مِن فَضْلِ اللَّهِ عَلَيْنَا وَعَلَى النَّاسِ وَلَٰكِنَّ أَكْثَرَ النَّاسِ لَا يَشْكُرُونَ

“And I have followed the religion of my fathers, – Ibrahim (Abraham), Ishaq (Isaac) and Ya’qub (Jacob)], and never could we attribute any partners whatsoever to Allah. This is from the Grace of Allah to us and to mankind, but most men thank not (i.e. they neither believe in Allah, nor worship Him).

(English – Mohsin Khan)