Yirmeyah 11:3-4

And say thou unto them, Thus saith HASHEM Elohei Yisroel; Arur (cursed) be the ish that obeyeth not the Divrei HaBrit Hazot, Which I commanded Avoteichem in the day that I brought them forth out from Eretz Mitzrayim, from the kur habarzel (the furnace of iron), saying, Obey My voice, and do all which I command you; so shall ye be My people, and I will be your Elohim