Surah An-Nisa, Verse 103

فَإِذَا قَضَيۡتُمُ ٱلصَّلَوٰةَ فَٱذۡكُرُواْ ٱللَّهَ قِيَٰمٗا وَقُعُودٗا وَعَلَىٰ جُنُوبِكُمۡۚ فَإِذَا ٱطۡمَأۡنَنتُمۡ فَأَقِيمُواْ ٱلصَّلَوٰةَۚ إِنَّ ٱلصَّلَوٰةَ كَانَتۡ عَلَى ٱلۡمُؤۡمِنِينَ كِتَٰبٗا مَّوۡقُوتٗا١٠٣

fa-idhā qaḍaytumu l-ṣalata fa-udh'kurū l-laha qiyāman waquʿūdan waʿalā junūbikum fa-idhā iṭ'manantum fa-aqīmū l-ṣalata inna l-ṣalata kānat ʿalā l-mu'minīna kitāban mawqūtan

And when you have completed the prayer, remember Allāh standing, sitting, or [lying] on your sides. But when you become secure, re-establish [regular] prayer. Indeed, prayer has been decreed upon the believers a decree of specified times.