2 Kings 2:7-8

Amplified Bible

⁷ Fifty men of the sons of the prophets also went and stood opposite them [to watch] at a distance; and the two of them stood by the Jordan. ⁸ And Elijah took his mantle (coat) and rolled it up and struck the waters, and they were divided this way and that, so that the two of them crossed over on dry ground.