Easton's Bible Dictionary (1897)
Heap of ruins; dew, a station of the Israelites in the wilderness (Num. 33:21, 22).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
RIS'SAH (a ruin, a worm), a station of Israel. Num 33:21-22. It has been identified with the Roman Rasa, 30 miles from Elath, near the hill now named Ras el-Kaa, or "head of the plain," north-west of Ezion-geber. Wilton would place it at 'Ain el-Jughamileh, 125 miles south-south-west of Beersheba; Reland locates it at el-Kusaby, 55 miles south-west of Beer-sheba.
Hitchcock's Bible Names (1869)
watering; distillation; dew