These last five kings joined forces in the Valley of Siddim (that is, the Salt Sea).

Then the king of Sodom, the king of Gomorrah, the king of Admah, the king of Zeboiim, and the king of Bela (that is, Zoar) went out and prepared for battle. In the Valley of Siddim they met

Now the Valley of Siddim was full of tar pits. When the kings of Sodom and Gomorrah fled, they fell into them, but some survivors fled to the hills.