Bhagavad Gita 18.44

कृषिगौरक्ष्यवाणिज्यं वैश्यकर्म स्वभावजम्।परिचर्यात्मकं कर्म शूद्रस्यापि स्वभावजम्॥

kṛṣigaurakṣyavāṇijyaṃ vaiśyakarma svabhāvajam |paricaryātmakaṃ karma śūdrasyāpi svabhāvajam ||

Agriculture, cattle-rearing, and trade are the duties of the Vaisya (merchant), born of their own nature; and service is the duty of the Sudra (servant-class), born of their own nature.

Agriculture, the protection of cows, and trade are the duties of a trader, in accordance with his nature. The duty of a servant is to serve, which also agrees with his nature.

Our plain-language meaning of this verse is waiting for scholar review.