Jeremiah 23:19-20

The judgment of God would come on the wicked like a whirlwind. He would carry out His purposes fully and not draw back in mercy. When His judgment fell, the wicked would understand it as His judgment. "In the last days" refers to the last days of Jerusalem before its total destruction; this is not an eschatological reference here. These verses occur again almost verbatim in Jeremiah 30:23-24.