Easton's Bible Dictionary (1897)
Fissure, a place apparently east of the Dead Sea (Gen. 10:19). It was afterwards known as Callirhoe, a place famous for its hot springs.
Smith's Bible Dictionary (1863)
(fissure), a place noticed in (Genesis 10:19) as marking the limit of the country of the Canaanites. It lay somewhere in the southeast of Palestine. Jerome and other writers identify it with Callirrhoe, a spot famous for hot springs, near the eastern shore of the Dead Sea.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
LA'SHA (fissure), a place on the south-eastern boundary of Canaan, Gen 10:19; identified by earlier Christian writers as Callirhoe, situated near the eastern shore of the Dead Sea, and famous for its hot springs.