Gob
Easton's Dictionary
A pit, a place mentioned in 2 Sam. 21:18, 19; called also Gezer, in 1 Chr. 20:4.
Smith's Dictionary
(cistern), a place mentioned only in (2 Samuel 21:18,19) as the scene of two encounters between David’s warriors and the Philistines. In the parallel account in (1 Chronicles 20:4) the name is given as Gezer.