Bhagavatapurana 3.12.34

3.12.34

kadācid dhyāyataḥ sraṣṭur vedā āsaṃś catur-mukhāt /
kathaṃ srakṣyāmy ahaṃ lokān samavetān yathā purā //

34. The directions embraced that fearful body which the learned speak of as mist or darkness. Once when he was contemplating how he should create the well-arranged worlds as they were before, the Vedas issued forth from the four faces of the maker (his four faces.)