3 occurrences in 3 dictionaries
Reference: Hareth
Easton
thicket, a wood in the mountains of Judah where David hid when pursued by Saul (1Sa 22:5). It was possibly while he was here that the memorable incident narrated in 2Sa 23:14-17; 1Ch 11:16-19 occurred. This place has not been identified, but perhaps it may be the modern Kharas, on the borders of the chain of mountains some 3 miles east of Keilah.
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Smith
Ha'reth
(thicket), The forest of, in which David took refuge, after at the instigation of the prophet Gad, he had quitted the "hold" or fastness of the cave of Adullam.