Śatapatha Brāhmaṇa ("of a hundred paths") 14.3.2.26

14.3.2.26

agnihotram vai pravargyaḥ sarvam vāagnihotraṃ sarvam pravargyaḥ sa yadadhiśritaṃ tatpravṛkto yadunnītaṃ tadrucito yaddhutaṃ tatpinvito yadā vāagnihotram pinvate'thainatsarve devāḥ sarvāṇi bhūtānyupajīvanti pinvate ha vā asmā agnihotraṃ ya evametadveda

The Pravargya, indeed, is the Agnihotra, for the Agnihotra is everything, and the Pravargya is everything: when it (the Agnihotra milk) is put on the fire then it is the (Gharma) placed thereon; when it is ladled out then it is the burning-hot (Gharma); and when it is offered then it is the overflowing (Gharma);--but, indeed, when the Agnihotra overflows all the gods and all beings subsist thereon; and, verily, the Agnihotra overflows for him who thus knows this.