The Moabites and Ammonites were children born out of deceit to Lot, cousin of Abraham. The Edomites were descendants of Esau. These three tribes - Moabites, Ammonites and Edomites - are mentioned repeatedly in the Bible, often as a duo or triumvate, in different attacks on the Israelites. What’s also interesting is that these enemies descended from marriage relations that were against God’s instructions!