Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.4.3

5.2.4.3

atha sākamedhairyajate | sākamedhairvai devā vṛtramaghnaṃstairveva vyajayanta yeyameṣāṃ vijitistāṃ tatho evaiṣa etaiḥ pāpmānaṃ dviṣantam bhrātṛvyaṃ hanti tatho eva vijayate vijite 'bhaye 'nāṣṭre sūyā iti

He then performs the Sâkamedhâh; for by the Sâkamedhâh the gods slew Vritra, and gained that universal conquest which now is theirs. And in, like manner does this (Sacrificer) thereby now slay his wicked, hateful enemy; and in like manner does he gain the victory, thinking, 'May I be consecrated, when safety and security are gained!'