Matsyapurana 3.7

3.7

tataḥ pulahanāmā vai tataḥ kratur ajāyata
pracetāś ca tataḥ putro vasiṣṭhaś cābhavat punaḥ //

The Lord Fish replied that first of all Brahmâ practised devout austerities, whereby were revealed the sacred Vedas, together with their complements and supplements and the metres. The oldest of all Śâstras was first recollected by Brahmâ—the eternal Brahman—in words, with its ten million elaborations. After that, Brahmâ revealed the sacred Vedas and the sciences of Mimânsa, Nyâya, &c., together with the eightfold proof. Inspired with the Vedic knowledge, Brahmâ became conscious of His supreme potentiality and through His desire created the ten sages, who are known as the Mânasa sons of the Creator, *viz.*, Marîchi, Atri, Angira, Pulastya, Pulaha, Kratu, Prachetâ, Bhṛigu, Vasiṣṭha and Nârada.