The magic, which was directed by the vicious priests against the guileless (Prahlāda), then fell upon them and slew them all; And beholding them thus consumed by fire the noble Prahlāda exclaiming, "Save, O Krishna, O Eternal" approached them and said—"O thou, spread all over the universe, O thou who art manifest in the universe, O thou the creator of the universe, O Janārddana! do thou save these Brāhmanas from the unbearable flame set up by their magical incantations.

In plain words: The evil magic turns back on the priests and burns them to death. Seeing them burn, Prahlada cries out to Krishna, the creator present everywhere, and begs him to save these same priests who tried to kill him.