1 Kings 18:31-35

Then Elijah took twelve stones, corresponding to the number of the tribes of the sons of Jacob, to whom the word of the Lord had come, saying, “Israel shall be your name.”

And with the stones he built an altar in the name of the Lord; and he made a trench around the altar, large enough to hold two measures of seed.

Then he laid out the wood, and he cut the ox in pieces and placed it on the wood.

And he said, “Fill four large jars with water and pour it on the burnt offering and on the wood.” And he said, “Do it a second time,” so they did it a second time. Then he said, “Do it a third time,” so they did it a third time.

The water flowed around the altar, and he also filled the trench with water. Elijah’s Prayer