Easton's Bible Dictionary (1897)
Coolness; fragrance, a town in Reuben, in the territory of Moab, on the east of Jordan (Josh. 13:19); called also Shebam and Shibmah (Num. 32:3, 38). It was famous for its vines (Isa. 16:9; Jer. 48:32). It has been identified with the ruin of Sumieh, where there are rock-cut wine-presses. This fact explains the words of the prophets referred to above. It was about 5 miles east of Heshbon.
Smith's Bible Dictionary (1863)
[Shebam]
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
SIB'MAH (coolness, or fragrance), a city east of the Jordan, built or fortified by the Reubenites; called also Shebam and Shibmah. Josh 13:19; Num 32:3, Acts 7:38. It is not noticed again until the prophet's lament over Moab. Isa 16:8-9; Jer 48:32. At that time it was a Moabite town noted for its grapes. Jerome says it was 500 paces from Heshbon. A trace of the name is found in the ruins es-Sameh, 4 miles east of Heshbon.
Hitchcock's Bible Names (1869)
conversion; captivity