Vishnupurana 4.1.p3

4.1.p3

From the mundane egg originated Brahmā, who was Hiranyagarbha, the form of that supreme Brahmā which consists of Vishnu as identical with Rig, Yajur and Sama Vedas—the first, uncreated cause of all worlds. From the right thumb of Brahmā originated the Patriarch Daksha whose daughter was Aditi, who was the mother of the sun. From the sun sprang Manu whose sons were Ikshawaku, Nriga, Dwrishta, Saryati, Narishyanta, Pransu, Nabhaga, Nedishta, Karusha, and Prishadhra. Being desirous of having offspring formerly Manu celebrated a sacrifice in honour of Mitra and Varuna; but the ceremony being unsuccessful on account of some irregularity from the presiding priest a daughter Ilā was born. But by the mercy of the two deities however, her sex was changed and she became a man under the name of Sudyumna. And he again became a woman under an imprecation (from Siva) near the hermitage of Buddha, the son of the moon.