He, indeed, is a Brahmana in whom are the Riches, the Yajushes, the Samans, and the explctives necessary for completing the rhythm of the Samans according to the rules laid down in Vedic grammars.
ऋचो यजूंषि सामानि स्तोभाश्च विधिचोदिताः। यस्मिन्नेतानि सर्वाणि भवन्तीह स वै द्विजः॥