قَرَيْنَاكُمْ فَعَجَّلْنَا قِرَاكُمْ قُبَيْلَ الصُّبْحِ مِرْدَاةً طَحُونَا
We “hosted” you and hastened your meal just before dawn: a heavy, grinding stone.
Qaraynākum and qirākum share the root q-r-y, intensifying the mock-hosting effect. Mirdāh is a weighty stone used for pounding or breaking, while ṭaḥūnan stresses its grinding force.
The earlier mill metaphor returns in a stone capable of crushing. The form of the exchange resembles a generous offering, but its substance is an attack; the line is deliberate irony.