Matthew Poole and continuators on Jeremiah 31:1

1 AT the same time, saith the LORD, will I be the God of all the families of Israel and they shall be my people .

When the Lords anger shall return, he having performed all the thoughts of his heart upon the wicked Israelites, he will declare himself not unmindful of the Covenant which he made with Abraham and his seed, but will be their God, and they shall be the people of his favour whom he will protect and bless. It is uncertain whether Israel here is to be taken in a more large sense as it signifieth the whole twelve Tribes or onely Iudah, being that part of Israel which was before spoken of.