Śatapatha Brāhmaṇa ("of a hundred paths") 1.3.4.9

1.3.4.9

atha yāmevāmṛṃ tṛtīyāṃ samidhamabhyādadhāti | anuyājeṣu brāhmaṇameva tayā samindhe sa brāhmaṇaḥ samiddho devebhyo yajñaṃvahati

By that third kindling-stick, then, which he puts on at the after-offerings, he kindles the officiating priest (brâhmana); and he, the priest, when kindled, carries the sacrifice to the gods.