This is an idiom that refers to traveling toward Jerusalem, which was on higher ground than the surrounding area. (See: [[rc://en/ta/man/translate/figs-idiom]])
"whom Nebuchadnezzar, ruler of Babylon, took away from their home country." The army of Babylon did this under the command of Nebuchadnezzar. (See: [[rc://en/ta/man/translate/figs-metonymy]])