Atharvaveda 7.3.1

7.3.1

ayā́ viṣṭhā́ janáyan kárvarāṇi sá hí ghŕ̥ṇir urúr várāya gātúḥ |
sá pratyúdaid dharúṇaṃ mádhvo ágraṃ sváyā tanvā̀ tanvàm airayata ||1||

By this shape (viṣṭhá) generating exploits (kárvara), he verily, fiery, a wide way for space (? vára); he went up to meet the sustaining top (ágra) of the sweet; with his own self (tanū́) he sent forth (īraya-) a self.