2:15-27 The priests and rulers are to appoint a solemn fast. The sinner's supplication is, Spare us, good Lord. God is ready to succour his people; and he waits to be gracious. They prayed that God would spare them, and he answered them. His promises are real answers to the prayers of faith; with him saying and doing are not two things. Some understand these promises figuratively, as pointing to gospel grace, and as fulfilled in the abundant comforts treasured up for believers in the covenant of grace.
25. locust … cankerworm … caterpiller … palmer worm—the reverse order from Joe 1:4, where (see on Joe 1:4) God will restore not only what has been lost by the full-grown consuming locust, but also what has been lost by the less destructive licking locust, and swarming locust, and gnawing locust.