Shatapatha Brahmana 5.2.4.12

5.2.4.12

sa hāgniruvāca | trayo mama bhāgāḥ santvekastaveti tatheti tāvetena haviṣā dikṣu nāṣṭrā rakṣāṃsyavāhatāṃ tau vyajayetāṃ yainayoriyaṃ vijitistāṃ tatho evaiṣa etena haviṣā dikṣu nāṣṭrā rakṣāṃsyavahanti tatho eva vijayate vijite 'bhaye nāṣṭre sūyā iti

Agni then spake, 'Let there be three shares for me, one for thee!'--'So be it!'--By that offering those two smote the fiends, the Rakshas, in the (four) quarters, and gained that universal conquest which now is theirs. And in like manner does this (Sacrificer) by that offering smite the fiends, the Rakshas, in the quarters; and gain the victory, thinking, 'May I be consecrated, when safety and security have been gained!'