Gobhilagrihyasutra 1.8.17

1.8.17

gaṇeṣv ekaṃ parisamūhanam idhmo barhiḥ paryukṣaṇam ājyam ājyabhāgau ca;

If different sacrifices are performed together, there is only one sweeping (of the ground) round (the fire) (chap. 3, 1), one (putting of) fuel (on the fire) (chap. 7, 19), one Barhis, one sprinkling (of water) round (the fire) (chap. 8, 2), one Âgya, and one offering of the two Âgyabhâgas (chap. 8, 3).