Surat Al-Qasas (The Stories) - القصص

فَرَدَدْنَٰهُ إِلَىٰٓ أُمِّهِۦ كَىْ تَقَرَّ عَيْنُهَا وَلَا تَحْزَنَ وَلِتَعْلَمَ أَنَّ وَعْدَ ٱللَّهِ حَقٌّ وَلَٰكِنَّ أَكْثَرَهُمْ لَا يَعْلَمُونَ ﴿١٣﴾

So We gave him back to his mother that her eye might be refreshed, and that she might no grieve, and that she might know that the promise of Allah is true, but most of them do not know.