Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 27
Sanskrit:
मन्वन्तरेषु भगवान् बिभ्रत्सत्त्वं स्वमूर्तिभि: ।मन्वादिभिरिदं विश्वमवत्युदितपौरुष: ॥ २७ ॥
ITRANS:
manvantareṣu bhagavānbibhrat sattvaṁ sva-mūrtibhiḥmanv-ādibhir idaṁ viśvamavaty udita-pauruṣaḥ
Translation:
In each and every change of Manu, the Supreme Personality of Godhead appears by manifesting His internal potency in different incarnations, as Manu and others. Thus He maintains the universe by discovered power.