Luke 3:15-17

15 As the people were in expectation, and all men reasoned in their hearts concerning John, whether perhaps he was the Christ,  16 John answered them all, "I indeed baptize you with water, but he comes who is mightier than I, the latchet of whose sandals I am not worthy to loosen. He will baptize you in the Holy Spirit and fire,  17 whose fan is in his hand, and he will thoroughly cleanse his threshing floor, and will gather the wheat into his barn; but he will burn up the chaff with unquenchable fire."