The ruling on parsing *bila kayf* in the poet’s verse

The questioner:
May Allah reward you. Honorable Shaykh, this questioner says: In the verse of the poet (may Allah have mercy on him), “And He, the Mighty, descends every night *bila kayf* (without how), the One, the Praiseworthy, the Exalted. How?” Is it built on the fathah or is it inflected?

The Shaykh:
*Bila kayf*, *bila kayf* is in the genitive case due to the preposition *ba*. If you say *bila kayf* is a quote (hikayah), that has a valid perspective. Yes.

The questioner:
He says, may Allah keep you safe: In the continuation of his question, if it has a tanwin, does the verse not break?

The Shaykh:
No, *bila kayf*. In fact, the verse might break with the fathah, because it becomes heavy. But with the tanwin, it becomes light.

The presenter:
May Allah reward you, Honorable Shaykh.

The Shaykh:
The metric patterns make the tanwin a nun. It is written with a nun. The tanwin is written as a letter with a nun. Yes.