Śatapatha Brāhmaṇa ("of a hundred paths") 3.4.1.8

3.4.1.8

na vai tadavakalpate | yaccandobhya iti kevalaṃ gṛhṇīyādyatra vā arhate pacanti tadabhitaḥ sācayo 'nvābhaktā bhavantyarājāno rājakṛtaḥ sūtagrāmaṇyastasmādyatraivaitasyai gṛhṇīyāttadeva candāṃsyanvābhajet

In no wise, then, is it befitting that he should take out any (material for offering) solely 'for the metres;' for whenever people cook food for some worthy person, then the attendants about him, the non-royal king-makers, the heralds and headmen, have their share (of the food) assigned to them; after (or along with their master): hence, when he takes out that (oblation to Soma), let him assign the metres a share in it along with (the deity).