Jeremiah 18:7-10

At one moment I might [suddenly] speak concerning a nation or kingdom, that I will uproot and break down and destroy; if that nation against which I have spoken turns from its evil, I will relent and reverse My decision concerning the devastation that I intended to do. Or at another time I might [suddenly] speak about a nation or kingdom that I will build up or establish; and if they do evil in My sight by not obeying My voice, then I will reverse My decision concerning the good with which I had promised to bless them.