From BiblePortal Wikipedia

Smith's Bible Dictionary [1]

Ha'reth. (Thicket). The Forest Of Hareth . 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.  1 Samuel 22:6.

Easton's Bible Dictionary [2]

 1 Samuel 22:5 2 Samuel 11:16-19

Holman Bible Dictionary [3]

 1 Samuel 22:5Hereth

Morrish Bible Dictionary [4]

Forest where David hid himself from Saul.  1 Samuel 22:5 .

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [5]

(Heb. Che'reth, חֶרֶת , the form חָרֶת , Cha'Reth, is on account of the pause-accent; prob. i.q. חֹרֶשׁ a Thicket: Sept. Χαρής v.r. [ Ἐν ] Πόλει [apparently reading עַיר ; so Josephus, Ant. 6: 12, 4],Vulg. Haret), a wood ( יִעִר ) in the mountains of Judah, where David hid himself from Saul, at the instance of the prophet Gad ( 1 Samuel 31:5); probably situated among the hills west of Socho. (See Forest).

International Standard Bible Encyclopedia [6]

hā´reth ( חרת , ḥā̄reth , in pause). See Hereth .

Kitto's Popular Cyclopedia of Biblial Literature [7]

Hareth, a forest in Judah, to which David fled from Saul [FOREST].