Here, I. Jeremiah is directed to write what God had spoken to him, which perhaps refers to all the foregoing prophecies. He must write them and publish them, in hopes that those who had not profited by what he said upon once hearing it might take more notice of it when in reading it they had leisure for a more considerate review. Or, rather, it refers to the promises of their enlargement, which had been often mixed with his other discourses. He must collect them and put them together, and God will now add unto them many like words. He must write them for the generations to come, who should see them accomplished, and thereby have their faith in the prophecy confirmed. He must write them not in a letter, as that in the chapter before to the captives, but in a book, to be carefully preserved in the archives, or among the public rolls or registers of the state. Daniel understood by these books when the captivity was about coming to an end, Dan. ix. 2. He must write them in a book, not in loose papers: "For the days come, and are yet at a great distance, when I will bring again the captivity of Israel and Judah, great numbers of the ten tribes, with those of the two," v. 3. And this prophecy must be written, that it may be read then also, that so it may appear how exactly the accomplishment answers the prediction, which is one end of the writing of prophecies. It is intimated that they shall be beloved for their fathers' sake (Rom. xi. 28); for therefore God will bring them again to Canaan, because it was the land that he gave to their fathers, which therefore they shall possess.