The lexical field of hosting is repeated through verses 32–33, but the item supposedly served is an inedible, crushing stone. The incongruity creates verbal irony.
ExpressionLiteral senseContextual effect
الأَضْيَافGuestsAddresses adversaries as guests
القِرَىHospitality/foodCalls a blow a gift
قَرَيْنَاكُمْWe hosted youRepeats the mock courtesy
مِرْدَاةً طَحُونًاA grinding stoneReveals the attack
The root used here for hosting should not be conflated with the root of reading or recitation simply because some transliterations look similar.