Trouble, a valley near Jericho, so called in consequence of the trouble which the sin of Achan caused Israel ([Josh. 7:24](/josh#Josh.7.24), [26](/josh#Josh.7.26)). The expression “valley of Achor” probably became proverbial for that which caused trouble, and when Isaiah ([Isa. 65:10](/isa#Isa.65.10)) refers to it he uses it in this sense: “The valley of Achor, a place for herds to lie down in;” i.e., that which had been a source of calamity would become a source of blessing. Hosea also ([Hos. 2:15](/hos#Hos.2.15)) uses the expression in the same sense: “The valley of Achor for a door of hope;” i.e., trouble would be turned into joy, despair into hope. This valley has been identified with the Wady Kelt.