3  God's forbearance with the idolatry of Judah, who is worse than Israel, Jer 3:1-11.
Both called to repent, with gospel promises, Jer 3:12-19.
Misery by sin; salvation only of God, Jer 3:20-25.

3:14 I am married - I am in covenant with you, and this covenant notwithstanding all your unfaithfulness, I am ready to renew with you.Family - This word is taken frequently for a country or nation, and this may partly respect the fewness of those that will return.But chiefly it respects God's exact care of them, that being now married to them, there shall not be one in a city, or two in a country or tribe, but he will find them out. Zion - The ten tribes did never return into their own land, therefore this must be understood of a spiritual going up to Zion, when all Israel shall be saved, Rom 11:26.

3:16 Multiplied - After the growth of the church under the Messiah.The ark - That whole worship with all the rites and ceremonies belonging to it shall cease, Christ being come, who was the substance of what the ark, and all other rites shadowed.Covenant - Called also the ark of the testimony, because the two tables of the law, which were the testimony, or witness of the covenant were in it.Any more - It shall be no more in use; neither shall men trouble their thoughts about it, or mention it.

3:17 The throne - Instead of the ark, the church typified by Jerusalem, shall be the place of God's residence, where by his spirit he will rule and act in his word and ordinances. Jerusalem - Dwelling in Jerusalem, or where the Lord placed his name, of old in Jerusalem, but now in the church. Neither - Both Jews and Gentiles shall now conform themselves to the will of God.

13 

13:19 When any one heareth the word, and considereth it not - The first and most general cause of unfruitfulness. The wicked one cometh - Either inwardly; filling the mind with thoughts of other things; or by his agent. Such are all they that introduce other subjects, when men should be considering what they have heard.

13:20 The seed sown on stony places, therefore sprang up soon, because it did not sink deep, Mat 13:5.He receiveth it with joy - Perhaps with transport, with ecstacy: struck with the beauty of truth, and drawn by the preventing grace of God.

13:21 Yet hath he not root in himself - No deep work of grace: no change in the ground of his heart. Nay, he has no deep conviction; and without this, good desires soon wither away.He is offended - He finds a thousand plausible pretences for leaving so narrow and rugged a way.

13:22 He that received the seed among the thorns, is he that heareth the word and considereth it - In spite of Satan and his agents: yea, hath root in himself is deeply convinced, and in a great measure inwardly changed; so that he will not draw back, even when tribulation or persecution ariseth. And yet even in him, together with the good seed, the thorns spring up, Mat 13:7. (perhaps unperceived at first) till they gradually chokeit, destroy all its life and power, and it becometh unfruitful. Cares are thorns to the poor: wealth to the rich; the desireof other things to all. The deceitfulness of riches - Deceitful indeed! for they smile, and betray: kiss, and smite into hell.They put out the eyes, harden the heart, steal away all the life of God; fill the soul with pride, anger, love of the world; make men enemies to the whole cross of Christ! And all the while are eagerly desired, and vehemently pursued, even by those who believe there is a God!

13:23 Some a hundred fold, some sixty, some thirty - That is, in various proportions; some abundantly more than others.