( وما أصابكم يوم التقى الجمعان ) بأحد من القتل والجرح والهزيمة ، ( فبإذن الله ) أي : بقضائه وقدره ، ( وليعلم المؤمنين ) أي : ليميز وقيل ليرى .
The death, wounds and defeat you suffered on the day of Uḥud, when your army and the army of the idolaters met, was by the permission and decree of Allah, with far-reaching wisdom behind it: to make it clear who truly had faith.