Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 12.2.22

12.2.22

āgmann āpa uśatīr barhir edam ity āgatavatyā paridadhāti /

(a verse ) containing the word 'across', 'The waters have arrived, eager, to this strew.' He recites appropriate (verses); what in the sacrifice is appropriate, that is perfect; verily (they serve) for the perfection of the sacrifice. The morning litany had been recited, the hymns had not been obtained ; at this conjunction the Asuras went against them; the gods, perceiving in fear, saw this thriceforged thunderbolt; 'The waters' is the first form of the thunderbolt; 'Sarasvatī' is the second form of the thunderbolt ; this is a hymn of fifteen verses, that is the third form of the thunderbolt. The gods with the thriceforged thunderbolt pushed away the Asuras from these worlds; verily thus also the sacrificer pushes away with this thriceforged thunderbolt the rivals who hate him from these worlds.