And Pragâpati, looking after them, said: 'They both go away without having perceived and without having known the Self, and whoever of these two, whether Devas or Asuras, will follow this doctrine (upanishad), will perish.' Now Virokhana, satisfied in his heart, went to the Asuras and preached that doctrine to them, that the self (the body) alone is to be worshipped, that the self (the body) alone is to be served, and that he who worships the self and serves the self, gains both worlds, this and the next.
In plain words: As they leave, Prajapati says that neither of them has truly understood the Self, and anyone who follows this idea will be ruined. Virochana goes home and teaches the demons that the body is the self, and that pampering and serving the body wins both this world and the next.