Jeremiah 11:3-4

and say thou unto them, Thus saith the LORD, the God of Israel: Cursed be the man that heareth not the words of this covenant, which I commanded your fathers in the day that I brought them forth out of the land of Egypt, out of the iron furnace, saying, Obey my voice, and do them, according to all which I command you: so shall ye be my people, and I will be your God