John Trapp on Jeremiah 36:5

Ver. 5. I am ſhut up] Or I am detained, or reſtrained; haply by ſome legal pollution that he had contracted, as by touching a dead carcaſſe, &c. or by ſome bodily infirmity, or by the lying in wait of his enemyes, or by the Spirit of God, as Act. 16 6, 7. for a puniſhment to the Jews by the Prophets abſence and ſilence; and for the ſafety of his ſervant in thoſe perilous times.