Srimad Bhagavatam Canto 10, Chapter 89, Text 01

SB 10.89.1

sri-suka uvaca
sarasvatyas tate rajann
rsayah satram asata
vitarkah samabhut tesam
trisv adhisesu ko mahan
 
Translation: 
 
Sukadeva Gosvami said: Once, O King, as a group of sages were performing a Vedic sacrifice on the banks of the Sarasvati River, a controversy arose among them as to which of the three chief deities is Supreme.
 
Purport: 
 
The three chief deities mentioned here are Lord Visnu, Lord Brahma and Lord Siva.
Srimad Bhagavatam Canto 10, Chapter 89, Text 02