From words of comfort the prophet here, by a very sudden change of his style, passes to words of reproof and conviction, and goes on in that strain, for the most part, in the three following chapters; and therefore some here begin a new sermon. He had assured the people that in due time God would deliver them out of captivity, which was designed for the comfort of those that should live when God would do this. Now here he shows what their sins and provocations were, for which God would send them into captivity, and this was designed for the conviction of those that lived in his own time, nearly a hundred years before the captivity, who were now filling up the measure of the nation's sin, and to justify God in what he brought upon them. God will lay them waste by the fierceness of their enemies, for the falseness of their friends.