In the fourth aliyah Moshe sends messengers to the King of Edom asking permission to pass through his land. He promises to not harm the land in any way. And moreover he promises to purchase food and drink from them despite the fact the Jews are self-sufficient with their manna and because of this the Edomites should benefit. However, the King of Edom replies that they may not pass through, and that he will come out with a sword to prevent them. To this Israel turns away in their travels.