Su, Sū., 2, 5.1 brāhmaṇas trayāṇāṃ varṇānām upanayanaṃ kartum arhati rājanyo dvayasya vaiśyo vaiśyasyaiveti śūdram api kulaguṇasampannaṃ mantravarjam anupanītam adhyāpayed ity eke //