Jeremiah 52:33,34

And changed his prison garments This has been considered by some an act of generosity in Evil-merodach, giving the captive king new garments, more suitable to his royal dignity than those he wore in prison. But Blaney thinks “it was rather the act of Jehoiachin himself, who, out of respect to the king of Babylon's presence, and to mark his just sense of the favour shown him, no longer neglected his person and dress, as when a prisoner, and in affliction: but put on new apparel more adapted to the change in his circumstances. So Joseph, when he was sent for out of prison to appear before Pharaoh, first shaved himself, and changed his raiment, Genesis 41:14. David did the same after he had ceased mourning for his child, before he went into the house of God, 2 Samuel 12:20. Mr. Harmer, (chap. 6. obs. 44, 45,) observes, both that to change the garments often is in the East a mark of respect in visiting; and also that the putting on of new clothes is thought by those people to be very requisite, and indeed almost necessary, for the due solemnization of a time of rejoicing.” And there was a continual diet given him of the king As it appears from the preceding verse that Jehoiachin himself sat at the king of Babylon's own table, this seems to have been an allowance for the maintenance of his attendants and family.