Śatapatha Brāhmaṇa ("of a hundred paths") 13.8.4.8

13.8.4.8

atha gṛheṣvagniṃ samādhāya vāraṇānparidhīnparidhāya vāraṇena sruveṇāgnaya āyuṣmata āhutiṃ juhotyagnirvā ā āyuṣmānāyuṣa īṣṭe tamevaibhya āyuryācatyagna āyūṃṣi pavasa iti puro'nuvākyābhājanam

Then, in the house, having made up the (domestic) fire, and laid enclosing-sticks of Varana wood round it, he offers, by means of a sruva-spoon of Varana wood, an oblation to Agni Âyushmat, for Agni Âyushmat rules over vital power: it is of him he asks vital power for these (the Sacrificer's family). [Vâg. S. XXXV, 16,] 'Thou, Agni, causest vital powers to flow: (send us food and drink, and keep calamity. far from us),' serves as invitatory formula.