نِمْتُ اللَّيْلَ
I slept during the night.
Here the time is mentioned, but the act of sleeping remains predicated of the human speaker. Therefore a temporal adjunct alone does not constitute rational figurative predication.
By contrast, a constructed comparison such as “نَامَ لَيْلُهُ” (his night slept) attributes sleeping to the time itself. This helps identify the crucial issue: which element is actually made the grammatical bearer of the predication?