1 Kings 18:31-38 New Revised Standard Version (NRSV)
31 Elijah took twelve stones, according to the number of the tribes of the sons of Jacob, to whom the word of the Lord came, saying, “Israel shall be your name”; 32 with the stones he built an altar in the name of the Lord. Then he made a trench around the altar, large enough to contain two measures of seed. 33 Next he put the wood in order, cut the bull in pieces, and laid it on the wood. He said, “Fill four jars with water and pour it on the burnt offering and on the wood.” 34 Then he said, “Do it a second time”; and they did it a second time. Again he said, “Do it a third time”; and they did it a third time, 35 so that the water ran all around the altar, and filled the trench also with water.
36 At the time of the offering of the oblation, the prophet Elijah came near and said, “O Lord, God of Abraham, Isaac, and Israel, let it be known this day that you are God in Israel, that I am your servant, and that I have done all these things at your bidding. 37 Answer me, O Lord, answer me, so that this people may know that you, O Lord, are God, and that you have turned their hearts back.” 38 Then the fire of the Lord fell and consumed the burnt offering, the wood, the stones, and the dust, and even licked up the water that was in the trench.