Surah Ar-Rum Verse 6

وَعْدَ اللَّهِ ۖ لَا يُخْلِفُ اللَّهُ وَعْدَهُ وَلَٰكِنَّ أَكْثَرَ النَّاسِ لَا يَعْلَمُونَ

[It is] the promise of Allah. Allah does not fail in His promise, but most of the people do not know