«إِنَّ الْأَبْرَارَ لَفِي نَعِيمٍ وَإِنَّ الْفُجَّارَ لَفِي جَحِيمٍ»
The righteous are surely in bliss, and the wicked are surely in blazing fire.
The two clauses use a parallel construction reinforced by inna and the emphatic lām. Their content contrasts al-abrār with al-fujjār and naʿīm with jaḥīm.
The rhetorical effect is not simply that endings sound alike; the strong semantic contrast within matching syntax foregrounds the two different outcomes.