E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Urim and Thummim
consisted of three stones, which were deposited in the double lining of the high priest’s breastplate. One stone represented Yes, one No, and one No answer is to be given. When any question was brought to the high priest to be decided by “Urim,” the priest put his hand into the “pouch” and drew out one of the stones, and according to the stone drawn out the question was decided. (Lev. viii. 8; 1 Sam. xxviii. 6.)
