He who has mastered all the Vedas, having served dutifully his preceptor and practised the vow of celibacy, he who knows all the Richs, Yajushes, and Samans, is not a twice-born one.
सर्वान् वेदानधीयीत शुश्रूषुर्ब्रह्मचर्यवान्। ऋचो यजूंषि सामानि न तेन न स वै द्विजः॥