John Wesley on 2 Kings 3:20

The meal - offering - That is, the morning sacrifice: which doubtless was attended with the solemn prayers of God's people. At this time Elisha joined his prayers with the prayers of God's people, especially those at Jerusalem. And this time God chose to answer their prayers, and to work this miracle, that thereby he might determine the controversy between the Israelites and the Jews, about the place and manner of worship, and give a publick testimony from heaven for the Jews, and against the Israelites. God that commands all the waters both above and beneath the firmament, sent them abundance of water on a sudden.