سورة النبإ

Imam Rida (peace be upon him): وَجَعَلْنَا اللَّیْلَ لِبَاسًا [And We made the night as a garment] — meaning that it is a garment upon the body of the day and [it covers the day].

Imam Rida (peace be upon him): We made the night as a garment for the day.

The Prophet (peace be upon him and his family): Yazid ibn Sallam said: ... I asked the Messenger of Allah (peace be upon him and his family): "Why is the night called layl?" He said: "Because it is the (time of) intimacy and affection of men with women. Allah the Mighty and Majestic made it a source of affection and a covering, as He Himself says: وَجَعَلْنَا اللَّیْلَ لِبَاسًا * وَجَعَلْنَا النَّهَارَ مَعَاشًا [And We made the night as a covering * And We made the day for seeking livelihood]."