Śatapatha Brāhmaṇa ("of a hundred paths") 13.8.4.9

13.8.4.9

atha juhoti āyuṣmānagne haviṣā vṛdhāno ghṛtapratīko ghṛtayoniredhi gṛtam pītvā madhu cāru gavyam piteva putramabhirakṣatādimāntsvāheti yathaivainānabhirakṣedyathābhigopāyedevametadāha

He then offers, with (Vâg. S. XXXV, 17), 'Long-lived be thou, O Agni, growing by offering, ghee-mouthed, ghee-born: drinking the sweet, pleasant cow's ghee, guard thou these, as a father does his son, hail!' he thus says this so that he (Agni) may guard and protect these (men).