'Urim' in the Bible
"You are to put the Urim and the Thummim into the breastpiece of decision; and they are to be over Aaron's heart when he goes in before the Lord. Aaron is to bear the decisions of the Israelites over his heart before the Lord continually.
He then set the breastpiece on him and put the Urim and Thummim into the breastpiece.
And he will stand before Eleazar the priest, who will seek counsel for him before the Lord by the decision of the Urim. At his command they will go out, and at his command they will come in, he and all the Israelites with him, the whole community."
Of Levi he said: Your Thummim and Urim belong to your godly one, whose authority you challenged at Massah, and with whom you argued at the waters of Meribah.
Then Saul said, "O Lord God of Israel! If this sin has been committed by me or by my son Jonathan, then, O Lord God of Israel, respond with Urim. But if this sin has been committed by your people Israel, respond with Thummim." Then Jonathan and Saul were indicated by lot, while the army was exonerated.
So Saul inquired of the Lord, but the Lord did not answer him -- not by dreams nor by Urim nor by the prophets.
The governor instructed them not to eat any of the sacred food until there was a priest who could consult the Urim and Thummim.
The governor instructed them not to eat any of the sacred food until there was a priest who could consult the Urim and Thummim.