Urim and Thummim
 

The priests used the Urim and Thummim to learn God's will (what God wanted them to do or what God wanted to happen).  No one really knows what the Urim and Thummim looked like. They are mysterious.

The first time the Urim and Thummin are in the Bible is in the book of Exodus, chapter 28 and verse 30. God told Moses to put the Urim and Thummim in the priest's breastplate (clothing).

In the book of Numbers, chapter 24 verse 21, the Bible says that Moses talked to God himself. But Joshua will know God's will from Eleazar the priest. God will show His will with the Urim and Thummim. Then Eleazar will tell Joshua.

In Deuteronomy 33:8, Moses says the Levites will use the Urim and Thummim to know God's will.

In other parts of the Bible, people "cast lots" to see God's will.  Some people who study the Bible think that casting lots may be the same as using Urim and Thummim.