All the rites consequent upon birth, O Bharata, are necessary in the case of all the three castes. All these rites, O Yudhishthira, in the case of both Brahmanas and Kshatriyas as also in that of Vaishyas, are to be performed with the help of Mantras.
जातकर्मादिकाः सर्वास्त्रिषु वर्णेषु भारत। ब्रह्माक्षत्रे हि मन्त्रोक्ता वैश्यस्य च युधिष्ठिर॥