5. The undoubted certainty of it, with the reason given for it, v. 28, 29. They will refuse to take the cup at thy hand; not only they will be loth that the judgment should come, but they will be loth to believe that ever it will come; they will not give credit to the prediction of so despicable a man as Jeremiah. But he must tell them that it is the word of the Lord of hosts, he hath said it; and it is in vain for them to struggle with Omnipotence: You shall certainly drink. And he must give them this reason, It is a time of visitation, it is a reckoning day, and Jerusalem has been called to an account already: I begin to bring evil on the city that is called by my name; its relation to me will not exempt it from punishment, and should you be utterly unpunished? No; If this be done in the green tree, what shall be done in the dry? If those who have some good in them smart so severely for the evil that is found in them, can those expect to escape who have worse evils, and no good, found among them? If Jerusalem be punished for learning idolatry of the nations, shall not the nations be punished, of whom they learned it? No doubt they shall: I will call for a sword upon all the inhabitants of the earth, for they have helped to debauch the inhabitants of Jerusalem.