Srimad Bhagavatam Canto 10, Chapter 03, Text 41

SB 10.3.41

adrstvanyatamam loke
 silaudarya-gunaih samam
aham suto vam abhavam
 prsnigarbha iti srutah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Since I found no one else as highly elevated as you in simplicity and other qualities of good character, I appeared in this world as Prsnigarbha, or one who is celebrated as having taken birth from Prsni.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
In the Treta-yuga the Lord appeared as Prsnigarbha. Srila Visvanatha Cakravarti Thakura says, prsnigarbha iti so ’yam treta-yugavataro laksyate.
Srimad Bhagavatam Canto 10, Chapter 03, Text 40
Srimad Bhagavatam Canto 10, Chapter 03, Text 42