Matsya Purana 58.31

58.31

utkṛṣṭān mantrajāpena tiṣṭhadhvamiti jāpakān.
evamādiśya tān sarvān paryukṣyāgniṃ sa mantravit.. 58.30 ..

The worshipper should seat himself on the south side, facing the north and the Âchârya should ask the eight (Hotâ) priests "Yajadhvam" to commence the sacrifice; and to the skilful Jâpakas he should say "tiṣṭhadvam" (to sit down). Thus directing them, the Âchârya, versed in the sacred text, should sprinkle water silently round the fire without uttering any ritual formula.—29-30.