The brahmanas and Vedic knowledge come from the mouth of the Supreme Personality of Godhead, the ksatriyas and bodily strength come from His arms, the vaisyas and their expert knowledge in productivity and wealth come from His thighs

Expressions researched:
"The brahmanas and Vedic knowledge come from the mouth of the Supreme Personality of Godhead, the ksatriyas and bodily strength come from His arms, the vaisyas and their expert knowledge in productivity and wealth come from His thighs"

Srimad-Bhagavatam

SB Canto 8

The brahmanas and Vedic knowledge come from the mouth of the Supreme Personality of Godhead, the ksatriyas and bodily strength come from His arms, the vaisyas and their expert knowledge in productivity and wealth come from His thighs.

SB 8.5.41, Translation

The brāhmaṇas and Vedic knowledge come from the mouth of the Supreme Personality of Godhead, the kṣatriyas and bodily strength come from His arms, the vaiśyas and their expert knowledge in productivity and wealth come from His thighs, and the śūdras, who are outside of Vedic knowledge, come from His feet. May that Supreme Personality of Godhead, who is full in prowess, be pleased with us.