Fissure, a place apparently east of the Dead Sea (Genesis 10:19). It was afterwards known as Callirhoe, a place famous for its hot springs.
Source: Easton's Bible Dictionary
Lasha
(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.