مَّا كَانَ عَلَى ٱلنَّبِيِّ مِنۡ حَرَجٖ فِيمَا فَرَضَ ٱللَّهُ لَهُۥۖ سُنَّةَ ٱللَّهِ فِي ٱلَّذِينَ خَلَوۡاْ مِن قَبۡلُۚ وَكَانَ أَمۡرُ ٱللَّهِ قَدَرٗا مَّقۡدُورًا

Maa kaana 'alan nabiyyyi min harajin feemaa faradal laahu lahoo sunnatal laahi fil lazeena khalaw min qabl; wa kaana amrul laahi qadaram maqdooraa

There can be no difficulty to the Prophet in what Allah has indicated to him as a duty. It was the practice (approved) of Allah amongst those of old that have passed away. And the command of Allah is a decree determined.

— Al-Ahzab (ٱلْأَحْزَاب), 33:38