Are you desirous of death that you are mentioning this again and again?" Prahlāda replied, "O father, Vishnu, who is Brahmā, is not only the creator, preserver and supreme lord of me only, but of all creatures as well as of thyself. Be propitiated; why art thou angry?" Hiranyakashipu said,—"What evil spirit has entered into the breast of this silly lad, that, he, like one possessed, gives expression to such profane words".
In plain words: The king threatens Prahlada with death. The boy calmly says Vishnu is the creator, protector and lord of every creature, including his father. He asks his father not to be angry. The king thinks some evil spirit has taken over his son.