Verse 1.2.1.7

sa upadadhāti | dhruvamasi pṛthivīṃ dṛṃheti pṛthivyā eva rūpeṇaitadeva dṛṃhatyetenaiva dviṣantam bhrātṛvyamavabādhate brahmavani tvā kṣatravani sajātavanyupadadhāmi bhrātṛvyasya vadhāyeti bahvī vai yajuḥsvāśīstadbrahma ca kṣatraṃ cāśāsta ubhe vīrya sajātavanīti bhūmā vai sajātāstadbhūmānamāśāsta upadadhāmi bhrātṛvyasya badhāyeti yadi nābhicaredyadya abhicaredamuṣya badhāyeti brūyādabhinihitameva savyasya pāṇeraṅgulyā bhavati

Preview of English translation:

7. He puts it on, with the text (Vajasaneyi Samhita I, 17 d): “Thou art firm; make thou the earth firm!” For under the form of the earth he renders this same (sacrifice) firm; by it he chases away the spiteful enemy. He adds: “Thee, devoted to the Brahman, devoted to the kshatra, devoted to the (sacrificer”s) kinsmen, I put on for the destruction of the enemy!' Manifold, indeed, are the prayers for blessing in the sacrificial texts (yajus): by this one he prays for the priestly and military orders, those two towers of strength (vi rye, energies). “Thee, devoted to the (sacrificer”s) kinsmen,' he says, because kinsmen mean wealth, and wealth he thereby prays for. When he says, “I put thee on for the destruction of the enemy,” whether or not he wishes to exorcise, let him say, “for the destruction of so and so!” The moment it (the potsherd) has been put down (and while it is still being touched) with the (fore-)finger of his left hand,—

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