Hadith.1362 - Abu al-Hasan al-Awwal عليه السلام said regarding the words of Allah سبحانه وتعالى, the Mighty and Majestic:
"But as for monasticism, they innovated it; We did not prescribe it for them except [that they did so] seeking the pleasure of Allah سبحانه وتعالى" (Surah Al-Hadid 57:27).
Imam عليه السلام said: "It refers to the night prayer (salat al-layl)."