Śatapatha Brāhmaṇa ("of a hundred paths") 2.4.2.13

2.4.2.13

sa juhoti | agnaye kavyavāhanāya svāhā somāya pitṛmate svāhetyagnau mekṣaṇamabhyādadhāti tatsviṣṭakṛdbhājanamatha dakṣiṇenānvāhāryapacanaṃ sakṛdullikhati tadvedibhājanaṃ sakṛdu hyeva parāñcaḥ pitarastasmātsakṛdullikhati

He offers with the formulas (Vâg. S. II, 29 a, b), 'To Agni, the bearer of what is meet for the wise, svâhâ!' 'To Soma, accompanied by the fathers, svâhâ!' He then puts the pot-ladle on the fire,--that being in lieu of the Svishtakrit. Thereupon he draws (with the wooden sword) one line (furrow) south of the Dakshina fire,--that being in lieu of the altar: only one line he draws, because the fathers have passed away once for all.