Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.4.8

5.2.4.8

atha yadetā aparāḥ pañcāhutīrjuhoti | kṣaṇvanti vā etadagnervivṛhanti yatpañcadhāhavanīyaṃ vyūhanti tadevāsyaitena saṃdadhāti tasmādetā aparāḥ pañcāhutīrjuhoti

And as to why he offers those five latter oblations. Now when they poke the Âhavanîya asunder into five parts, thereby they wound and tear some of the fire; and hereby now he heals it: therefore he offers those five latter oblations.