This is a truth that Brahma created the twice-born persons from his mouth; and the Kshatriyas (or the people of the warrior class) from his arms, and also he created the Vaisyas (or the merchant class) from his thighs; and the Sudras (or the people of the servile class) from his feet.
ब्रह्मणा ब्राह्मणाः सृष्टा मुखात् क्षत्रं च बाहुतः॥ ऊरुभ्यामसृजद् वैश्याशूद्रान पद्भ्यामिति श्रुतिः।