The subjects thus created by the lotus-born deity did not flourish in this world. For the purpose of increase, lord Brahmā performed a penance with the supreme lord in view, in the company of his mental sons. The great lord was pleased by their penance. Realising Brahma’s desire, the lord pierced through the middle of Brahmā’s forehead. Saying “I am your son” he then became male-cum-female in his form.