Exodus 14:29-31

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.