That wretch of a Brahmana, who neglects to satisfy his duties and whose conduct becomes wicked becomes, O king, a Shudra. The Brahmana, who marries a Shudra woman, who becomes vile in conduct or a dancer or a village servant or performs other unbecoming acts, becomes a Shudra.
शूद्रो राजन्भवति ब्रह्मबन्धु १श्चारित्रो यश्च धर्मादपेतः। वृषलीपतिः पिशुनो नर्तनश्च राजप्रेष्यो यश्च भवेद् विकर्मा॥