وَجَعَلْنَا اللَّيْلَ لِبَاسًا.
And We made the night a covering.
In Qurʾan 78:10, the night is called a covering. Clothing conceals the body, and darkness draws a cover over things. Neither “like” nor an explicit phrase such as “in concealment” is stated, yet the context makes the similarity intelligible.
The wording is compact and forceful: rather than saying night is “like a covering,” it calls night a covering. This is rhetorical likeness, not an assertion of physical identity.