Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 58
Sanskrit:
स तु सत्यव्रतो राजा ज्ञानविज्ञानसंयुत: ।विष्णो: प्रसादात् कल्पेऽस्मिन्नासीद् वैवस्वतो मनु: ॥ ५८ ॥
ITRANS:
sa tu satyavrato rājājñāna-vijñāna-saṁyutaḥviṣṇoḥ prasādāt kalpe ’sminnāsīd vaivasvato manuḥ
Translation:
King Satyavrata was illuminated with all Vedic knowledge by the mercy of Lord Viṣṇu, and in this period he has now taken birth as Vaivasvata Manu, the son of the sun-god.
Purport:
Śrīla Viśvanātha Cakravartī Ṭhākura gives his verdict that Satyavrata appeared in the Cākṣuṣa-manvantara. When the Cākṣuṣa-manvantara ended, the period of Vaivasvata Manu began. By the grace of Lord Viṣṇu, Satyavrata received instructions from the second fish incarnation and was thus enlightened in all spiritual knowledge.