Albert Barnes Commentary Jeremiah 11:4

"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;" — Jeremiah 11:4 (ASV)

From the iron furnace - Rather, out of the iron furnace, Egypt . The constant reference to Deuteronomy shows how great had been the effect upon Jeremiah’s mind of the public recitation of the Book of the covenant found in the temple.