The Direct Answer
The Moabites were Israel's neighbors and relatives east of the Dead Sea, descended from Lot's older daughter after the fall of Sodom (Genesis 19). Their kingdom sat in the highlands between the Arnon and Zered rivers with Dibon as a key city, they worshiped the god Chemosh, and they spoke a language nearly identical to Hebrew. The Bible remembers them through Balak's hired curse, Eglon's oppression, King Mesha's rebellion, and above all Ruth, the Moabite widow who became King David's great-grandmother and stands in the genealogy of Jesus. Archaeology confirms them spectacularly: the Mesha Stele, carved by Moab's own king, still talks back to 2 Kings 3.
An Honest Beginning
Born From The Worst Night In Genesis
Scripture does not launder anyone's origin story, and Moab's is one of the rawest in the Bible. After Sodom and Gomorrah fell, Lot and his two daughters hid in a cave, convinced the world had ended. The daughters got their father drunk on successive nights and each conceived by him. The older named her son Moab, a name the Hebrew hears as a bitter pun, "from father," and the younger bore Ben-Ammi, ancestor of the Ammonites. That is the recorded birth certificate of two whole nations: trauma, fear, and a family's darkest decision, written down without a drop of varnish.
Hold onto that, because the Bible is playing a long game with it. A nation born from incest in a cave is exactly the kind of family line every ancient culture would bury. God, instead, kept a file open on Moab, and the last entry in that file is a wedding in Bethlehem and a baby named Obed. Scripture names brokenness honestly precisely because it intends to redeem it, which tells you something about how grace treats the chapters of your story you'd rather burn.
The Land And Its God
Moab occupied the tableland east of the Dead Sea, rugged highlands cut by deep gorges, roughly between the Arnon river (today's Wadi Mujib) and the Zered, with Ammon to the north, Edom to the south, and Israel across the Jordan. Their national god was Chemosh, and Moab's spiritual story turns dark at exactly that altar: in 2 Kings 3:27, with his capital under siege, King Mesha "took his oldest son who was to reign in his place and offered him for a burnt offering on the wall." That is what Chemosh asked of his most devoted king: his firstborn's life for a military rescue.
Feel the whole distance between that and the gospel. Chemosh demanded a king's son on the wall; the living God put no one's child on an altar, and instead gave Himself in His Son to end the ancient machinery of appeasement for good. When Scripture rages against idols, this is why: idols always take, and they take what you love most. It is one of the clearest windows into how the Old Testament's hard scenes and the face of Jesus fit together, and why God calls Himself jealous for His people: He is protecting them from gods like that.
East of the Dead SeaBetween the Arnon & ZeredKey city: DibonNational god: ChemoshNeighbors: Ammon, Edom, IsraelLanguage: nearly identical to Hebrew