Jeremiah 11:3

And say thou to them, Thus saith the LORD God of Israel; (a) Cursed [be] the man that obeyeth not the words of this covenant,

(a) He calls the Jews to the consideration of God's mercy, who freely chose them, made a covenant of eternal happiness with them and how he ever performed it on his behalf and how they ever showed themselves rebellious and ingrate toward him, and broke it on their part, and so are subject to the curse of the law, (Deuteronomy 27:26).