Srimad Bhagavatam Canto 10, Chapter 65, Text 28

SB 10.65.28

rama rama maha-baho
 na jane tava vikramam
yasyaikamsena vidhrta
 jagati jagatah pate
 
Translation: 
 
[Goddess Yamuna said:] Rama, Rama, O mighty-armed one! I know nothing of Your prowess. With a single portion of Yourself You hold up the earth, O Lord of the universe.
 
Purport: 
 
The phrase ekamsena (“with a single portion”) refers to the Lord’s expansion as Sesa. This is confirmed by the acaryas.
Srimad Bhagavatam Canto 10, Chapter 65, Text 27
Srimad Bhagavatam Canto 10, Chapter 65, Text 29