Meaning
Figurative: "Thou shalt thresh the mountains," i.e. thou wilt overcome great difficulties (Isa 41:15). Babylon's destruction was foretold poetically in the language of the threshing-floor (Isa 21:10, Jer 51:33, Dan 2:35); Zion's foes would be gathered as sheaves on the threshing-floor (Mic 4:12, Mic 4:13; compare 2Kgs 13:7, Amos 1:3, Hab 3:12); threshing unto the vintage, i.e. throughout the summer, indicated an extra abundant yield (Le 26:5).
James A. Patch