Albert Barnes Commentary Jeremiah 3:19

"But I said, How I will put thee among the children, and give thee a pleasant land, a goodly heritage of the hosts of the nations! and I said, Ye shall call me My Father, and shall not turn away from following me." — Jeremiah 3:19 (ASV)

But I - (emphatic). “And I.” The emphasis lies in the abundant goodness of God contrasted with Israel’s waywardness.

How ...? - Rather, How ...! that is, How gloriously! With what honor will I place you among the children!

Goodly ... of the hosts ... - Rather, “a heritage of the chief beauty of nations.” The general sense is, that Israel “possesses the most beautiful territory of any nation.”

And I said - This clause is not the answer to a difficulty, as in the King James Version, but completes the description of God’s loving purpose. “I said within myself that I would treat you as a son, and give you a glorious inheritance: I also said, that you would return my love, would call me Father, and be untrue to me no more.”