13:1-6 In the time mentioned at the close of the foregoing chapter, a fountain would be opened to the rulers and people of the Jews, in which to wash away their sins. Even the atoning blood of Christ, united with his sanctifying grace. It has hitherto been closed to the unbelieving nation of Israel; but when the Spirit of grace shall humble and soften their hearts, he will open it to them also. This fountain opened is the pierced side of Christ. We are all as an unclean thing. Behold a fountain opened for us to wash in, and streams flowing to us from that fountain. The blood of Christ, and God's pardoning mercy in that blood, made known in the new covenant, are a fountain always flowing, that never can be emptied. It is opened for all believers, who as the spiritual seed of Christ, are of the house of David, and, as living members of the church, are inhabitants of Jerusalem. Christ, by the power of his grace, takes away the dominion of sin, even of beloved sins. Those who are washed in the fountain opened, as they are justified, so they are sanctified. Souls are brought off from the world and the flesh, those two great idols, that they may cleave to God only. The thorough reformation which will take place on the conversion of Israel to Christ, is here foretold. False prophets shall be convinced of their sin and folly, and return to their proper employments. When convinced that we are gone out of the way of duty, we must show the truth of our repentance by returning to it again. It is well to acknowledge those to be friends, who by severe discipline are instrumental in bringing us to a sight of error; for faithful are the wounds of a friend, Pr 27:6. And it is always well for us to recollect the wounds of our Saviour. Often has he been wounded by professed friends, nay, even by his real disciples, when they act contrary to his word.
3. The form of phraseology here is drawn from De 13:6-10; 18:20. The substantial truth expressed is that false prophecy shall be utterly abolished. If it were possible for it again to start up, the very parents of the false prophet would not let parental affection interfere, but would be the first to thrust him through. Love to Christ must be paramount to the tenderest of natural ties (Mt 10:37). Much as the godly love their children, they love God and His honor more.