Śatapatha Brāhmaṇa ("of a hundred paths") 1.8.2.2

1.8.2.2

te punaranusaṃsparśayanti | punarevaitadagnimāpyāyayantyayātayāmānaṃ kurvantyayātayāmni yadata urdhvamasaṃsthitaṃ yajñasya tattanavāmā iti tasmātpunaranusaṃsparśayanti 1.8.2[[.]]3 atha samidhamabhyādadhāti | saminddha evainametatsamiddhe yadata ūrdhvamasaṃsthitaṃ yajñasya tattanavāmahā iti tasmātsamidhamabhyādadhāti

Thereupon they again move them close (to the fire). Thereby they cause the fire to increase again and to be no longer out-worn: 'Let us perform what part of the sacrifice remains still unaccomplished in such (fire) as is not out-worn!' so think they, and for this reason they again move them close (to the fire).