Srimad Bhagavatam Canto 03, Chapter 11, Text 27

SB 3.11.27

manvantaresu bhagavan
 bibhrat sattvam sva-murtibhih
manv-adibhir idam visvam
 avaty udita-paurusah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
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.
Srimad Bhagavatam Canto 03, Chapter 11, Text 26
Srimad Bhagavatam Canto 03, Chapter 11, Text 28