28:30 Urim and the Thummim. The mysterious Urim and Thummim, set in the twelve-jeweled breastplate of the high priest (Leviticus 8:8), evidently had something to do with recognizing God’s will for the twelve tribes in their wanderings and conflicts (Note Numbers 27:21; Deuteronomy 33:8; I Samuel 28:6; Ezra 2:63; Nehemiah 7:65). Exactly what they were and how they functioned has been the object of much speculation; if their meaning was something like “lights and perfections,” as most scholars believe, they must have been in some way a medium of special divine guidance during this strategic period in God’s plan for His people Israel.