Surah Al-Qasas, ayah 13

28:13

فَرَدَدۡنَٰهُ إِلَىٰٓ أُمِّهِۦ كَيۡ تَقَرَّ عَيۡنُهَا وَلَا تَحۡزَنَ وَلِتَعۡلَمَ أَنَّ وَعۡدَ ٱللَّهِ حَقّٞ وَلَٰكِنَّ أَكۡثَرَهُمۡ لَا يَعۡلَمُونَ ١٣

Faradadnāhu ilā ummihī kay taqarra 'aynuhā walā tahzana walita'lama anna wa'dallāhi haqqun walākinna aktharahum lā ya'lamūn

So We restored him to his mother that she might be content and not grieve and that she would know that the promise of Allāh is true. But most of them [i.e., the people] do not know.