When Jeremiah (the prophet) prophesied the destruction of the nation, King Zedekiah disliked hearing it and had him thrown into Malchiah's pit to die. Jucal was one of the officials who was with him at that time.
Jeremiah 38:1Now Shephatiah son of Mattan, Gedaliah son of Pashhur, Jucal son of Shelemiah, and Pashhur son of Malchiah heard what Jeremiah was telling all the people.