Srimad Bhagavatam Canto 10, Chapter 57, Text 15

SB 10.57.15

ya idam lilaya visvam
 srjaty avati hanti ca
cestam visva-srjo yasya
 na vidur mohitajaya
 
Translation: 
 
“It is the Supreme Lord who creates, maintains and destroys this universe simply as His pastime. The cosmic creators cannot even understand His purpose, bewildered as they are by His illusory Maya.
 
Purport: 
 
The use of the singular yah, “He who,” indicates that the frequent references to “the two Lords, Krsna and Rama,” do not compromise the firm principle of monotheism expressed in the Srimad-Bhagavatam. As explained in many Vedic literatures, the one Supreme Lord expands Himself into innumerable forms, yet He remains the one and almighty God. For example, we have this statement in the Brahma-samhita (5.33): advaitam acyutam anadir ananta-rupam. “The one Supreme Lord is infallible and beginningless, and He expands Himself into innumerable manifest forms.” Out of regard for the spirit of the Lord’s pastimes, in which He expands Himself and appears as His own older brother, Balarama, the Bhagavatam here refers to “the two Lords.” But the “bottom line” is that there is one Supreme Godhead, one Absolute Truth, who appears in His original form as Krsna.
Srimad Bhagavatam Canto 10, Chapter 57, Text 14
Srimad Bhagavatam Canto 10, Chapter 57, Text 16