Isaiah 56:9
9All you animals of the field, come to devour, all you animals in the forest.
Wesley: a prediction of Israel’s destruction by cruel enemies. Having encouraged the Gentiles with gracious promises, the prophet now terrifies unbelieving Jews: as the Gentiles would believe and be saved, so they would reject their Messiah and be destroyed.
Arminian interpreters keep this historic: beasts are invading powers. The fork is faith or refusal. The very Lord who opened the house of prayer (vv. 1–8) now summons judgment on a people who will not have their own salvation.
Calvin: the threat seems to clash with the consolation, yet it is mercy to the faithful and a stripping of hypocrites. Believers must not lose courage when ruin draws near; the self-secure must not clutch promises that do not belong to them. Beasts of the field are enemies of every kind—Babylon chiefly, and others after—called in by God, not by chance.
The gathering of outcasts (v. 8) and the devouring of a neglected flock stand in one book. Providence can restore and still judge shepherds who toast while the wall is down.