An Nisa, 103 Ayah
4:103
فَإِذَا قَضَيۡتُمُ ٱلصَّلَوٰةَ فَٱذۡكُرُواْ ٱللَّهَ قِيَٰمٗا وَقُعُودٗا وَعَلَىٰ جُنُوبِكُمۡۚ فَإِذَا ٱطۡمَأۡنَنتُمۡ فَأَقِيمُواْ ٱلصَّلَوٰةَۚ إِنَّ ٱلصَّلَوٰةَ كَانَتۡ عَلَى ٱلۡمُؤۡمِنِينَ كِتَٰبٗا مَّوۡقُوتٗا ١٠٣
Fa'idhā Qađaytumu Aş-Şalāata Fādhkurū Al-Laha Qiyāmāan Wa Qu`ūdāan Wa `Alá Junūbikum ۚ Fa'idhā Aţma'nantum Fa'aqīmū Aş-Şalāata ۚ 'Inna Aş-Şalāata Kānat `Alá Al-Mu'uminīna Kitābāan Mawqūtāan
And when you have completed the prayer, remember Allah 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.