One verse

Bhagavad Gita 18.41

18.41

ब्राह्मणक्षत्रियविशां शूद्राणां च परन्तप | कर्माणि प्रविभक्तानि स्वभावप्रभवैर्गुणैः ||१८-४१||

brāhmaṇakṣatriyaviśāṃ śūdrāṇāṃ ca parantapa . karmāṇi pravibhaktāni svabhāvaprabhavairguṇaiḥ ||18-41||

brāhmaṇa
of the brāhmaṇas
kṣatriya
the kṣatriyas
viśām
and the vaiśyas
śūdrāṇām
of the śūdras
ca
and
param-tapa
O subduer of the enemies
karmāṇi
the activities
pravibhaktāni
are divided
svabhāva
their own nature
prabhavaiḥ
born of
guṇaiḥ
by the modes of material nature

Brāhmaṇas, kṣatriyas, vaiśyas and śūdras are distinguished by the qualities born of their own natures in accordance with the material modes, O chastiser of the enemy.