Hiranyakeshigrihyasutra 1.1.3.5

1.1.3.5

āyurdā agne \ ityeṣā \ āyurdā deva jarasaṃ gṛṇāno ghṛtapratīko ghṛtapṛṣṭho agne \ ghṛtaṃ pibannamṛtaṃ cāru gavyaṃ piteva putraṃ jarase nayemam \ svāhā \5\

(The Mantras for the two chief oblations are), the (verse), 'Life-giving, Agni!' (Taitt. Brâhmana I, 2, 1, 11), (and),
'Life-giving, O god, choosing long life, thou whose face is full of ghee, whose back is full of ghee, Agni, drinking ghee, the noble ambrosia that comes from the cow, lead this (boy) to old age, as a father (leads) his son. Svâhâ!'