«لَقَدْ أَمْسَيْتُ أَخَا عَيْلَةٍ، لَا أَمْلِكُ بَيْتَ لَيْلَةٍ»
I have fallen into destitution; I do not even possess a place to stay for one night.
Akhā ʿaylah literally calls a person a ‘brother of poverty’: a conventional way of describing one engulfed by a condition. Bayta laylah reduces his claim to the most basic need for a night’s shelter.
The speaker’s rhetoric traces a fall from former comfort to an alleged absence of even temporary accommodation.