Śatapatha Brāhmaṇa ("of a hundred paths") 5.4.3.26

5.4.3.26

athaudumbarīṃ śākhāmupaspṛśati | ūrgasyūrjam mayi dhehīti tadūrjamātmandhatte tasyaitasya karmaṇa etāveva śatamānau pravṛttau dakṣiṇā tau brahmaṇe dadāti brahmā hi yajñaṃ dakṣiṇato 'bhigopāyati tasmāttau brahmaṇe dadāti

He then touches the udumbara branch, with, 'Sustenance thou art: bestow sustenance upon me!' He thereby takes sustenance (strength) to himself. Those same two round satamânas are the fee for this ceremony. He gives them to the Brahman priest, for the Brahman protects the sacrifice from the south: therefore he gives them to the Brahman.