Since I (Krsna) found no one else as highly elevated as you (Devaki, then Prsni) 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 - SB 10.3.41

Expressions researched:
"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 Pṛśnigarbha, or one who is celebrated as having taken birth from Pṛśni"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

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 Pṛśnigarbha, or one who is celebrated as having taken birth from Pṛśni.

SB 10.3.41, Translation and Purport

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 Pṛśnigarbha, or one who is celebrated as having taken birth from Pṛśni.

In the Tretā-yuga the Lord appeared as Pṛśnigarbha. Śrīla Viśvanātha Cakravartī Ṭhākura says, pṛśnigarbha iti so 'yaṁ tretā-yugāvatāro lakṣyate.