An-Naba Verse 10

and made the night as a cover,

and made the night a covering,

and We appointed night for a garment,

the night as a cover,

And We have made the night a covering.

And made the night as a covering,

and made the night a covering,

The night a covering,

And made the night a cover.

and make the night a covering?

And We have made the night as a cloak (covering both you and the world).

And We have made the night as a covering,

And We made the night a cover

And made the night a cover.

And made the night to be a covering

And have made the night as a covering (through its darkness),

And made the day for seeking livelihood.

And We made the night to be a covering,

And have appointed the night as a cloak,

made the night as a covering,

and We made the night a mantle,

And We have made the night as a covering,

and the night as a cover,

And made the night a cover?

and made the night a cloak?, to cover you with its darkness,

And We have made the night as a covering,

meaning, its shade and darkness covers the people.

This is as Allah says,

وَالَّيْلِ إِذَا يَغْشَـهَا

By the night as it conceals it. (91;4)

Qatadah commented;
وَجَعَلْنَا الَّيْلَ لِبَاساً
meaning, a tranquil residence.

Concerning Allah's statement,

وَجَعَلْنَا النَّهَارَ مَعَاشًا

and the night a vestment and black was the colour chosen to absorb all light emanating from the cosmic sources of illumination