Boyd’s Bible Dictionary:
(fragrant). A fortified city of Reuben, east of Jordan (Josh. 13:19). Shebam (Num. 32:3). Shibmah (Num. 32:38). Noted for its grapes (Isa. 16:8-9; Jer. 48:32).
Concise Bible Dictionary:
City of Reuben on the east of the Jordan, famous for its vines (Josh. 13:19; Isa. 16:8-9; Jer. 48:32). It is called SHEBAM in Numbers 32:3, and SHIBMAH in Numbers 32:38. Identified by some with Sumia, 31° 49' N, 35° 46' E, where there are ancient rock-cut wine presses.
Jackson’s Dictionary of Scripture Proper Names:
proper spelling of Shibmah