Genesis 14:3-10

All of these [kings] joined together [as allies] in the Valley of Siddim (that is, the Sea of Salt). Twelve years they had served Chedorlaomer [the most powerful king in the invading confederacy], but in the thirteenth year they rebelled. In the fourteenth year Chedorlaomer and the [three] kings who were with him attacked and subdued the Rephaim in Ashteroth-karnaim, the Zuzim in Ham, and the Emim in Shaveh-kiriathaim, and the Horites in their mountainous country of Seir, as far as El-paran, which is on the border of the wilderness. Then they turned back and came to En-mishpat (that is, Kadesh), and subdued all the country of the Amalekites, and also the Amorites who lived in Hazazon-tamar. Then the kings of Sodom, Gomorrah, Admah, Zeboiim, and Bela (that is, Zoar) came out; and they joined together for battle with the invading kings in the Valley of Siddim, against Chedorlaomer king of Elam and Tidal king of Goiim and Amraphel king of Shinar and Arioch king of Ellasar—four kings against five. Now the Valley of Siddim was full of tar (bitumen) pits; and as the kings of Sodom and Gomorrah fled, they fell into them. But the remainder [of the kings] who survived fled to the hill country.