Vale of Siddim

Boyd’s Bible Dictionary:

(pitted vale). A vale, full of slime-pits, supposedly near the Dead Sea, in which the kings of the plain cities met their invaders (Gen. 14:1-101And it came to pass in the days of Amraphel king of Shinar, Arioch king of Ellasar, Chedorlaomer king of Elam, and Tidal king of nations; 2That these made war with Bera king of Sodom, and with Birsha king of Gomorrah, Shinab king of Admah, and Shemeber king of Zeboiim, and the king of Bela, which is Zoar. 3All these were joined together in the vale of Siddim, which is the salt sea. 4Twelve years they served Chedorlaomer, and in the thirteenth year they rebelled. 5And in the fourteenth year came Chedorlaomer, and the kings that were with him, and smote the Rephaims in Ashteroth Karnaim, and the Zuzims in Ham, and the Emims in Shaveh Kiriathaim, 6And the Horites in their mount Seir, unto El-paran, which is by the wilderness. 7And they returned, and came to En-mishpat, which is Kadesh, and smote all the country of the Amalekites, and also the Amorites, that dwelt in Hazezon-tamar. 8And there went out the king of Sodom, and the king of Gomorrah, and the king of Admah, and the king of Zeboiim, and the king of Bela (the same is Zoar;) and they joined battle with them in the vale of Siddim; 9With Chedorlaomer the king of Elam, and with Tidal king of nations, and Amraphel king of Shinar, and Arioch king of Ellasar; four kings with five. 10And the vale of Siddim was full of slimepits; and the kings of Sodom and Gomorrah fled, and fell there; and they that remained fled to the mountain. (Genesis 14:1‑10)).