'Chains' in the Bible

The word which came to Jeremiah from Yahweh, after that Nebuzaradan the captain of the guard had let him go from Ramah, when he had taken him being bound in chains among all the captives of Jerusalem and Judah, who were carried away captive to Babylon.

Now, behold, I release you this day from the chains which are on your hand. If it seems good to you to come with me into Babylon, come, and I will take care of you; but if it seems bad to you to come with me into Babylon, don't: behold, all the land is before you; where it seems good and right to you to go, there go.