Śatapatha Brāhmaṇa ("of a hundred paths") 8.3.2.14

8.3.2.14

atha prāṇabhṛta upadadhāti | prāṇā vai prāṇabhṛtaḥ prāṇānevaitadupadadhāti tā daśa bhavanti daśa vai prāṇāḥ pūrvārdha upadadhāti purastāddhīme prāṇā āyurme pāhi jyotirme yaceti prāṇo vai jyotiḥ prāṇam me yacetyevaitadāha tā anantarhitā ṛtavyābhya upadadhāti prāṇo vai vāyurṛtuṣu tadvāyum pratiṣṭhāpayati

He then lays down the Prânabhrit (bricks);--the Prânabhrits (breath-holders), doubtless, are the vital airs: it is the vital airs he thus lays into (Agni's body). There are ten of them, for there are ten vital airs. He places them in the forepart (of the altar),--for there are these vital airs in front,--with (Vâg. S. XIV, 17), 'Protect my vital strength! protect mine up-breathing! protect my down-breathing! protect my through-breathing! protect mine eye! protect mine ear! increase my speech! animate my mind! protect my soul (or body)! give me light!'--He lays them down so as not to be separated from the seasonal ones, for the vital air is wind: he thus establishes the wind in the seasons.