Luke 3:15-18

15 Now as the people were in expectation, and all reasoned in their hearts about John, whether he was the Christ or not,

16 John answered, saying to all, "I indeed baptize you with water; but One mightier than I is coming, whose sandal strap I am not worthy to loose. He will baptize you with the Holy Spirit and fire.

17 His winnowing fan is in His hand, and He will thoroughly clean out His threshing floor, and gather the wheat into His barn; but the chaff He will burn with unquenchable fire."

18 And with many other exhortations he preached to the people.