What was said v. 7, that they should have heard the words of the former prophets, is here enlarged upon, for warning to these hypocritical enquirers, who continued their sins when they asked with great preciseness whether they should continue their fasts. This prophet had before put them in mind of their fathers' disobedience to the calls of the prophets, and what was the consequence of it (ch. i. 4-6), and now here again; for others' harms should be our warnings. God's judgments upon Israel of old for their sins were written for admonition to us Christians (1 Cor. x. 11), and the same use we should make of similar providences in our own day.