Jeremiah 4:4-5
4
Circumcise yourselves to Yahweh, and take away the foreskins of your heart, you men of Judah and inhabitants of Jerusalem; lest my wrath go forth like fire, and burn so that none can quench it, because of the evil of your doings.
5
Declare in Judah, and publish in Jerusalem; and say, 'Blow the trumpet in the land!' Cry aloud and say, 'Assemble yourselves! Let us go into the fortified cities!'