Surah An-Nur, ayah 53

۞ وَأَقۡسَمُواْ بِٱللَّهِ جَهۡدَ أَيۡمَٰنِهِمۡ لَئِنۡ أَمَرۡتَهُمۡ لَيَخۡرُجُنَّۖ قُل لَّا تُقۡسِمُواْۖ طَاعَةٞ مَّعۡرُوفَةٌۚ إِنَّ ٱللَّهَ خَبِيرُۢ بِمَا تَعۡمَلُونَ ٥٣

Wa aqsamū billāhi jahda aymānihim la in amartahum layakhrujunna qul lā tuqsimū tā'atum ma'rūfatun innallāha khabīru bimā ta'malūn

And they swear by Allāh their strongest oaths that if you ordered them, they would go forth [in Allāh's cause]. Say, "Do not swear. [Such] obedience is known.¹⁰⁰⁰ Indeed, Allāh is [fully] Aware of that which you do."