16 And it shall come to pass, when ye are multiplied in the land and become fruitful, in those days, saith Jehovah, they shall say no more, Ark of the covenant of Jehovah! neither shall it come to mind, nor shall they remember it, nor shall they visit [it]; neither shall it be done any more. 17 At that time they shall call Jerusalem the throne of Jehovah; and all the nations shall be gathered unto it, to the name of Jehovah, to Jerusalem; and they shall no more walk after the stubbornness of their evil heart. 18 In those days the house of Judah shall walk with the house of Israel; and they shall come together out of the land of the north, to the land which I caused your fathers to inherit.
Matthew Henry's Commentary on Jeremiah 3:16-18
Commentary on Jeremiah 3:12-20
(Read Jeremiah 3:12-20)
See God's readiness to pardon sin, and the blessings reserved for gospel times. These words were proclaimed toward the north; to Israel, the ten tribes, captive in Assyria. They are directed how to return. If we confess our sins, the Lord is faithful and just to forgive them. These promises are fully to come to pass in the bringing back the Jews in after-ages. God will graciously receive those that return to him; and by his grace, he takes them out from among the rest. The ark of the covenant was not found after the captivity. The whole of that dispensation was to be done away, which took place after the multitude of believers had been greatly increased by the conversion of the Gentiles, and of the Israelites scattered among them. A happy state of the church is foretold. He can teach all to call him Father; but without thorough change of heart and life, no man can be a child of God, and we have no security for not departing from Him.