'Chains' in the Bible

The word which came to Jeremiah from Jehovah, 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, that were carried away captive unto Babylon.

And now, behold, I loose thee this day from the chains which are upon thy hand. If it seem good unto thee to come with me into Babylon, come, and I will look well unto thee; but if it seem ill unto thee to come with me into Babylon, forbear: behold, all the land is before thee; whither it seemeth good and right unto thee to go, thither go.