The right of inheritance (or rather, of taking possession) is thine. The right, however, was dependent on the previous right of redeeming the land. Hence the speaker continues: The redemption is thine; buy it for thyself.
The Law directs, "If thy brother be waxen poor, and hath sold away some of his possession, and if any of his kin come to redeem it, then shall he redeem that which his brother sold" (Le Jeremiah 25:25).
Jeremiah's kinsman, however, ascribes to him the right of pre-emption. This is not mentioned in Leviticus; hut, of course, no one would care to purchase a property till he was sure that the next kinsman would not insist on redeeming it.
No one, it may be remarked, could purchase land unconditionally—the usufruct of it till the year of jubilee was all that was legally transferable; and even the original occupant had only a life interest in his land, the ownership of which was, strictly speaking, vested in the commune.
This seems to Be the necessary inference from a comprehensive view of the passages relative to land in the Old Testament. Then I knew, etc. We may, perhaps, interpret this notice combined with that in verse 6 thus: Jeremiah had had a presentiment, founded, perhaps, upon the distress to which his cousin had been reduced, that the latter would invite him to carry out the provisions of the Law; and his presentiments were generally so ordered by the Divine Spirit of prophecy as to be ratified by the event.
Still, he had a measure of uncertainty till Hanameel actually came to him, and so demonstrated "that this had been the word of the Lord." In recording the circumstances, he not unnaturally reflects his later feeling of certitude in his description of the presentiment.