mokṣasaṃnyāsayoga - Verse śloka 44
śloka 44
kṛṣigaurakṣyavāṇijyaṃ vaiśyakarma svabhāvajam |
paricaryātmakaṃ karma śūdrasyāpi svabhāvajam ||18-44||
Translation
Agriculture, cattle-rearing and commerce—these are the natural duties of a Vaishya; and the natural duty of a Shudra is service.