Agniveshyagrihyasutra 3.11.3.7

3.11.3.7

homārheṇājyena somāya pitṛmata ityādiṣaḍbhirmantrairhutvātha nāmadheyairjuhoti amuṣmai svadhā namo 'muṣmai svadhā nama ityaṣṭābāhutayaḥ \

Having offered clarified butter fit for sacrifice with six mantras beginning with "To Soma accompanied by the ancestors...", he then offers with names: "Svadhā, homage to so-and-so; svadhā, homage to so-and-so"—these are eight oblations.