Śatapatha Brāhmaṇa ("of a hundred paths") 7.1.1.38

7.1.1.38

athainau saṃnivapati | saṃjñāmevābhyāmetatkaroti samitaṃ saṃkalpethāṃ saṃ vām manāṃsi saṃ vratāgne tvam purīṣyo bhavataṃ naḥ samanasāviti śamayatyevaināvetadahiṃsāyai yathā nānyo 'nyaṃ hiṃsyātām

He then pours those two (fires) together,--he thereby establishes concord between them--with (Vâg. S. XII, 57-60), 'Unite ye two, and get ye on together, loving, radiant, well-disposed, dwelling together for food and drink!--Together have I brought your minds, together your rites, together your thoughts: O Agni Purîshya, be thou the overlord, and bestow thou food and drink upon our Sacrificer!--O Agni, thou art the Purîshya, wealthy, prosperous: having made happy all the regions, seat thee here in thine own seat!--Be ye two unto us of one mind, of one thought, without guile! Injure ye not the sacrifice, nor the lord of the sacrifice, and be ye propitious unto us this day, ye knowers of beings!' He therewith pacifies them for (mutual) safety, so that they shall do no injury to one another.