Wikipedia
In the Hebrew Bible, the Urim and Thummim (, Standard ha-Urim veha-Tummim Tiberian hāʾÛrîm wəhatTummîm) are associated with the hoshen ( High Priest's breastplate), divination in general, and cleromancy in particular. Most scholars suspect that the phrase refers to specific objects involved in the divination.
In the Latter Day Saint movement, the Urim and Thummim ( and ) (also called Interpreters) usually refers to a set of seer stones bound by silver bows into a set of spectacles, that movement founder Joseph Smith said he found buried in the hill Cumorah with the golden plates.
Usage examples of "urim and thummim".
He knelt down to find Urim and Thummim and put them back in the pouch.
And Nehemiah and Attharias told them not to share in the holy things until a high priest should appear wearing Urim and Thummim.