It was only the Kshatriya and the Vaishya who could serve the Brahmana hy touching his bcdy or approaching his presence. The Brahmanas are gifted with a mild disposition. They are truthful in conduct. They are followers of the true religion.
संस्पर्शपरिचर्यस्तु वैश्येन क्षत्रियेण च। मृदुभावान् सत्यशीलान् सत्यधर्मानुपालकान्॥