2 And the captain of the guard took Jeremiah and said to him: "The Lord your God has pronounced this doom on this place. 3 Now the Lord has brought it, and has done just as He said. Because you people have sinned against the Lord, and not obeyed His voice, therefore this thing has come upon you. 4 And now look, I free you this day from the chains that were on your hand. If it seems good to you to come with me to Babylon, come, and I will look after you. But if it seems wrong for you to come with me to Babylon, remain here. See, all the land is before you; wherever it seems good and convenient for you to go, go there." 5 Now while Jeremiah had not yet gone back, Nebuzaradan said, "Go back to Gedaliah the son of Ahikam, the son of Shaphan, whom the king of Babylon has made governor over the cities of Judah, and dwell with him among the people. Or go wherever it seems convenient for you to go." So the captain of the guard gave him rations and a gift and let him go.
Matthew Henry's Commentary on Jeremiah 40:2-5
Commentary on Jeremiah 40:1-6
(Read Jeremiah 40:1-6)
The captain of the guard seems to glory that he had been God's instrument to fulfil, what Jeremiah had been God's messenger to foretell. Many can see God's justice and truth with regard to others, who are heedless and blind as to themselves and their own sins. But, sooner or later, all men shall be made sensible that their sin is the cause of all their miseries. Jeremiah has leave to dispose of himself; but is advised to go to Gedaliah, governor of the land under the king of Babylon. It is doubtful whether Jeremiah acted right in this decision. But those who desire the salvation of sinners, and the good of the church, are apt to expect better times from slight appearances, and they will prefer the hope of being useful, to the most secure situations without it.