These1 are two adversaries who have disputed over their Lord. But those who disbelieved will have cut out for them garments of fire. Poured upon their heads will be scalding water
These are two parties arguing regarding their Lord, as to which of them is right: the party of faith and party of disbelief. The party of disbelief will be encompassed by the fire, just as clothes cover the person wearing them, and extremely hot water will be poured on top of their heads.