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a day when (yawma is a substitution for the [syntactical] locus of li-yawmin, 'to an [awful] day', and as such is in the accusative because of [the verb] mab'ūthūna, 'will be resurrected') mankind will rise, from their graves, before the Rabb of the Worlds?, [the Rabb of] all creatures, for His affair, His reckoning and His requital.