Agniveshyagrihyasutra 2.5.7.6

2.5.7.6

guḷapāyasaṃ ghṛtamiśramathānnasya bali mupaharati amuṣmai svāhāmuṣmai svāhā iti dvādaśabhiryathāliṅgam \

Then he presents an offering of food, milk-rice cooked with jaggery and mixed with clarified butter, with the twelve [names] according to their characteristics, saying: "Svāhā to such-and-such! Svāhā to such-and-such!"