﴿ ٱلَّذِينَ يَذْكُرُونَ ٱللَّهَ قِيَٰمًۭا وَقُعُودًۭا وَعَلَىٰ جُنُوبِهِمْ وَيَتَفَكَّرُونَ فِى خَلْقِ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ رَبَّنَا مَا خَلَقْتَ هَٰذَا بَٰطِلًۭا سُبْحَٰنَكَ فَقِنَا عَذَابَ ٱلنَّارِ ﴾

“[and] who remember God when they stand, and when they sit, and when they lie down to sleep, and [thus] reflect on the creation of the heavens and the earth: "O our Sustainer! Thou hast not created [aught of] this without meaning and purpose. Limitless art Thou in Thy glory! Keep us safe, then, from suffering through fire!”

Those who remember God, standing, sitting, and [reclining] on their sides�He [Sahl] said:Whoever wishes to memorise the Qurʾān should complete three whole readings following the conditions stated in this verse: a reading completed while standing in prayer, a reading completed while sitting and studying it, and a reading completed while reclining on one�s side. Then, he will not forget [it], God willing, Mighty and Majestic is He. Moreover, whoever occupies himself with seeking knowledge with the full awareness of God, and with the recitationof the Qurʾān, the remembrance (dhikr) of God, Mighty and Majestic is He, adherence to the Sunna, and avoidance of all frivolity (lahw), will not be afflicted by disease or sickness. Furthermore, whoever obeys God with knowledge and sincere intention (nīya) will not lose his mind [lit. intellect, ʿaql].The Prophet said, �Whoever obeys God, Mighty and Majestic is He, has truly remembered Him, but whoever disobeys Him has truly forgotten Him.� His words: