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.
Luke 3:16
Surrounding context
3:15 Now as the people were in expectation, and all reasoned in their hearts about John, whether he was the Christ or not,
3:16 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.
3:17 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."