IV. A charge of sin upon them, as the procuring cause of these desolating judgments (v. 5): For the transgression of Jacob is all this. If it be asked, "Why is God so angry, and why are Jacob and Israel thus brought to ruin by his anger?" the answer is ready: Sin has done all the mischief; sin has laid all waste; all the calamities of Jacob and Israel are owing to their transgressions; if they had not gone away from God, he would never have appeared thus against them. Note, External privileges and professions will not secure a sinful people from the judgments of God. If sin be found in the house of Israel, if Jacob be guilty of transgression and rebellion, God will not spare them; no, he will punish them first, for their sins are of all others most provoking to him, for they are most reproaching. But it is asked, What is the transgression of Jacob? Note, When we feel the smart of sin it concerns us to enquire what the sin is which we smart for, that we may particularly war against that which wars against us. And what is it? 1. It is idolatry; it is the high places; that is the transgression, the great transgression which reigns in Israel; that is spiritual whoredom, the violation of the marriage-covenant, which merits a divorce. Even the high places of Judah, though not so bad as the transgression of Jacob, were yet offensive enough to God, and a remaining blemish upon some of the good reigns. Howbeit the high places were not taken away. 2. It is the idolatry of Samaria and Jerusalem, the royal cities of those two kingdoms. These were the most populous places, and where there were most people there was most wickedness, and they made one another worse. These were the most pompous places; there men lived most in wealth and pleasure, and they forgot God. These were the places that had the greatest influence upon the country, by authority and example; so that from them idolatry and profaneness went forth throughout all the land, Jer. xxiii. 15. Note, Spiritual distempers are most contagious in persons and places that are most conspicuous. If the head city of a kingdom, or the chief family in a parish, be vicious and profane, many will follow their pernicious ways, and write after a bad copy when great ones set it for them. The vices of leaders and rulers are leading ruling vices, and therefore shall be surely and sorely punished. Those have a great deal to answer for indeed that not only sin, but make Israel to sin. Those must expect to be made examples that have been examples of wickedness. If the transgression of Jacob is Samaria, therefore shall Samaria become a heap. Let the ringleaders in sin hear this and fear.