فَهَلْ حُرٌّ يَرَى تَخْفِيفَ أَثْقَالِي بِمِثْقَالٍ
Will a generous free person lighten my burden with a mithqāl?
Athqālī / mithqāl belong to a common semantic field of weight. The beggar calls his afflictions burdens and asks for a measured amount of wealth that might lighten them.
The pattern is more than rhyme. It uses literal weight to answer a figurative burden. The request feels compact because the speaker can bridge emotional distress and material relief through related words. The literary link clarifies the appeal without verifying the claims behind it.