Śatapatha Brāhmaṇa ("of a hundred paths") 1.2.1.10

1.2.1.10

atha yatpaścāttadupadadhāti | dharuṇamasyantarikṣaṃ dṛṃhetyantarikṣasyaiva rūpeṇaitadeva dṛṃhatyetenaiva dviṣantam bhrātṛvyamavabādhate brahmavani tvā kṣatravani sajātavanyupadadhāmi bhrātṛvyasya badhāyeti 1.2.1[.1]1 atha yatpurastāttadupadadhāti | dhartramasi divaṃ dṛṃheti diva eva rūpeṇaitadeva dṛṃhatyetenaiva ... badhāyeti

He then puts on that (potsherd) which is (to stand) behind (or west of the first or central one), with the text (Vâg. S. I, 18 b): 'A support art thou! make firm the aërial region!' Under the form of the atmosphere he makes this (sacrifice) firm; by this 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!'