A Brahmana should teach, study, officiate at other people's sacrifices, and offer sacrifices himself. He should not give away uselessly or accept other people's gifts uselessly.
अध्यापयेदधीयीत याजयेत यजेत वा। न वृथा प्रतिगृह्णीयान च दद्यात् कथंचना॥