Exodus 15:22

18The LORD will reign forever and ever.”

19For the horses of Pharaoh went in with his chariots and with his horsemen into the sea, and the LORD brought back the waters of the sea on them; but the children of Israel walked on dry land in the middle of the sea.

20Miriam the prophetess, the sister of Aaron, took a tambourine in her hand; and all the women went out after her with tambourines and with dances.

21Miriam answered them, “Sing to the LORD, for he has triumphed gloriously. He has thrown the horse and his rider into the sea.”

22Moses led Israel onward from the Red Sea, and they went out into the wilderness of Shur; and they went three days in the wilderness, and found no water.

23When they came to Marah, they couldn’t drink from the waters of Marah, for they were bitter. Therefore its name was called Marah.

24The people murmured against Moses, saying, “What shall we drink?”

25Then he cried to the LORD. The LORD showed him a tree, and he threw it into the waters, and the waters were made sweet. There he made a statute and an ordinance for them, and there he tested them.

26He said, “If you will diligently listen to the LORD your God’s voice, and will do that which is right in his eyes, and will pay attention to his commandments, and keep all his statutes, I will put none of the diseases on you which I have put on the Egyptians; for I am the LORD who heals you.”