قُمِ ٱلَّيْلَ إِلَّا قَلِيلًا Qur’an Al-Muzzammil (73:2)Qumi allayla ill a qaleel a n
The Prophet was prone to austerities in the cave of Hiraa, both before and after he received his mission, spending days and nights in prayer and contemplation. Midnight and after-midnight prayers have technically received the name of Tahajjud. See also verse 20 below; also xvii. 79.