Bhagavatapurana 8.5.41

8.5.41

vipro mukhādbrahma ca yasya guhyaṃ rājanya āsīdbhujayorbalaṃ ca /
ūrvorviḍ ojo 'ṅghriravedaśūdrau prasīdatāṃ naḥ sa mahāvibhūtiḥ //

41. "May the most glorious Lord be gracious unto us from whose face the Brahmin and the Vedas have come; from whose loins, the Kshatrya; from whose arms, Strength; from whose thighs, the Vaisya and his skill in business; from whose feet the Sudra whose duty is service, other than the study of the Vedas!