Therefore, all the four castes are holy. All the castes are allied to one another by blood through the intermediate classes. They have all originated from Brahmanas. In ascertaining (the priority of origin) it will be seen that amongst all the cases the Brahmana was created first. Originally Saman was one; Yajus was one, and Rich was one.
तस्माद्वर्णा ऋजवो ज्ञातिवर्णाः संसृज्यन्ते तस्य विकार एव। एकं साम यजुरेकमृगेका विप्रश्चैको निश्चये तेषु सृष्टः॥