Melachim Bais 2:8-10

Orthodox Jewish Bible

⁸ And Eliyahu took his aderet (mantle, cloak), and rolled it up, and struck the mayim, and they were split from here and from there, so that they two crossed over on charavah (dry ground [See Yehoshua 3:17]).

⁹ And it came to pass, when they were crossed over, that Eliyahu said unto Elishah, Request what I shall do for thee, before I am taken away from thee. And Elishah said, Let, now, a double portion of thy ruach be upon me.

¹⁰ And he said, Thou hast asked a hard thing; nevertheless, if thou see me when lukach (I am taken away) from thee, it shall be so unto thee; but if not, it shall not be so.