BG 18.41
कर्माणि प्रविभक्तानि स्वभावप्रभवैर्गुणैः ॥
karmāṇi pravibhaktāni svabhāva-prabhavair guṇaiḥ
Word-for-word meanings
param-tapa — O chastiser of foes; karmāṇi — the prescribed actions; brāhmaṇa — of the brāhmaṇas; kṣatriya — the kṣatriyas; viśām — the vaiśyas; ca — and; śūdrāṇām — of the śūdras; pravibhaktāni — are divided; guṇaiḥ — according to the guṇas; prabhavaiḥ — born of; svabhāva — [their previously acquired] nature.
Translation
O chastiser of foes, the prescribed actions of the brāhmaṇas, kṣatriyas, vaiśyas, and śūdras are appropriately divided according to the guṇas born of their previously acquired natures.