Surah Al-Ahzab (The Enemy Alliance), Verse 38

مَا كَانَ عَلَی النَّبِیِّ مِنْ حَرَجٍ فِیْمَا فَرَضَ اللّٰهُ لَهٗ سُنَّةَ اللّٰهِ فِی الَّذِیْنَ خَلَوْا مِنْ قَبْلُ وَكَانَ اَمْرُ اللّٰهِ قَدَرًا مَّقْدُوْرَا ۟

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.”

Quran 33:38 (Yusuf Ali Translation)