17:11-21 The parable is explained, and the particulars of the history of the Jewish nation at that time may be traced. Zedekiah had been ungrateful to his benefactor, which is a sin against God. In every solemn oath, God is appealed to as a witness of the sincerity of him that swears. Truth is a debt owing to all men. If the professors of the true religion deal treacherously with those of a false religion, their profession makes their sin the worse; and God will the more surely and severely punish it. The Lord will not hold those guiltless who take his name in vain; and no man shall escape the righteous judgment of God who dies under unrepented guilt.

19. mine oath—The "covenant" being sworn in God's name was really His covenant; a new instance in relation to man of the treacherous spirit which had been so often betrayed in relation to God. God Himself must therefore avenge the violation of His covenant "on the head" of the perjurer (compare Ps 7:16).