Verse 14.1.2.17

atha khare sādayati makhāya tvā makhasya tvā śīrṣṇa ityasāveva bandhuratha mṛtpiṇḍamapādāya mahāvīraṃ karoti makhāya tvā makhasya tvā śīrṣṇa ityasāveva bandhuḥ prādeśamātram prādeśamātramiva hi śiro madhye saṅgṛhītam madhye saṅgṛhītamiva hi śiro'thāsyopariṣṭāttryaṅgulam mukhamunnayati nāsikāmevāsminnetaddadhāti taṃ niṣṭhitamabhimṛśati makhasya śiro'sīti makhasya hyetatsaumyasya śira evamitarau tūṣṇīm pinvane tūṣṇīṃ rauhiṇakapāle

Preview of English translation:

17. He then deposits (the sambharas) on the mound with, “For Makha thee! for Makha’s head thee!” the import of this is the same as before. He then takes a lump of clay and makes the Mahavira (pot) with, “For Makha thee! for Makha’s head thee,”—the import of this is the same as before;—a span high, for the head is, as it were, a span high;—contracted in the middle, for the head is, as it were, contracted in the middle. At the top he then draws it out (so as to form) a spout of three thumbs’ breadths (high): he thereby makes a nose to this (Mahavira, or Pravargya). When it is complete, he touches it with (Vajasaneyi Samhita XXXVII, 8), “Makha’s head thou art,”—for it indeed is the head of Makha Saumya (the Soma-sacrifice). In the same way (he makes) the other two (Mahavira pots); silently two milking-bowls (pinvana), and silently two Rauhina-plates.

For a detailled translation, including proper diacritics and footnotes, go the full English translation.