Jeremiah 4:1-4 (KJV)
1 If thou wilt return, O Israel, saith the Lord, return unto me: and if thou wilt put away thine abominations out of my sight, then shalt thou not remove. 2 And thou shalt swear, The Lord liveth, in truth, in judgment, and in righteousness; and the nations shall bless themselves in him, and in him shall they glory.
3 For thus saith the Lord to the men of Judah and Jerusalem, Break up your fallow ground, and sow not among thorns. 4 Circumcise yourselves to the Lord, and take away the foreskins of your heart, ye men of Judah and inhabitants of Jerusalem: lest my fury come forth like fire, and burn that none can quench it, because of the evil of your doings.