Srimad Bhagavatam Canto 08, Chapter 07, Text 23

SB 8.7.23

guna-mayya sva-saktyasya
 sarga-sthity-apyayan vibho
dhatse yada sva-drg bhuman
 brahma-visnu-sivabhidham
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O lord, you are self-effulgent and supreme. You create this material world by your personal energy, and you assume the names Brahma, Visnu and Mahesvara when you act in creation, maintenance and annihilation.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
This prayer is actually offered to Lord Visnu, the purusa, who in His incarnations as the guna-avataras assumes the names Brahma, Visnu and Mahesvara.
Srimad Bhagavatam Canto 08, Chapter 07, Text 22
Srimad Bhagavatam Canto 08, Chapter 07, Text 24