Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 4.10.7

4.10.7

api vā sthālī pākam eva gārhapatye śrapayitvā navānām etābhya āgrayaṇa devatābhya āhavanīye juhuyāt sviṣṭakṛc caturthībhyo amuṣyai svāhā amuṣyai svāhā iti devatānām aparihāṇāya / (Vikṛti iṣṭayah)

Or having cooked a dish of rice on the Gārhapatya fire from the new [grains], he should offer it on the Āhavanīya fire to these deities of the Āgrayaṇa, with [Agni] Sviṣṭakṛt as fourth, [saying,] 'To that [deity] svāhā, to that [deity] svāhā', so that the deities are not neglected.