Exodus 14:28-31

And the waters returned, and covered the chariots, and the horsemen, even all the host of Pharaoh that went in after them into the sea; there remained not so much as one of them. But the children of Israel walked upon dry land in the midst of the sea; and the waters were a wall unto them on their right hand, and on their left. Thus Jehovah saved Israel that day out of the hand of the Egyptians; and Israel saw the Egyptians dead upon the sea-shore. And Israel saw the great work which Jehovah did upon the Egyptians, and the people feared Jehovah: and they believed in Jehovah, and in his servant Moses.