Srimad Bhagavatam Canto 08, Chapter 24, Text 56

SB 8.24.56

asrausid rsibhih sakam
 atma-tattvam asamsayam
navy asino bhagavata
 proktam brahma sanatanam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
While sitting in the boat, King Satyavrata, accompanied by the great saintly persons, listened to the instructions of the Supreme Personality of Godhead in regard to self-realization. These instructions were all from the eternal Vedic literature [brahma]. Thus the King and sages had no doubt about the Absolute Truth.
Srimad Bhagavatam Canto 08, Chapter 24, Text 55
Srimad Bhagavatam Canto 08, Chapter 24, Text 57