One verse

Srimad Bhagavatam 11.17.12

11.17.12

त्रेतामुखे महाभाग प्राणान्मे हृदयात्‍त्रयी । विद्या प्रादुरभूत्तस्या अहमासं त्रिवृन्मख: ॥ १२ ॥

tretā-mukhe mahā-bhāga prāṇān me hṛdayāt trayī vidyā prādurabhūt tasyā aham āsaṁ tri-vṛn makhaḥ

tretā-mukhe
at the beginning of Tretā-yuga
mahā-bhāga
O greatly fortunate one
prāṇāt
from the abode of prāṇa, or the life air
me
My
hṛdayāt
from the heart
trayī
the threefold
vidyā
Vedic knowledge
prādurabhūt
appeared
tasyāḥ
from that knowledge
aham
I
āsam
appeared
tri-vṛt
in three divisions
makhaḥ
sacrifice

O greatly fortunate one, at the beginning of Tretā-yuga Vedic knowledge appeared from My heart, which is the abode of the air of life, in three divisions — as Ṛg, Sāma and Yajur. Then from that knowledge I appeared as threefold sacrifice.