Exodus 28:29-31

Common English Bible

²⁹ In this way, Aaron will carry the names of Israel’s sons on the chest pendant for making decisions over his heart when he goes into the sanctuary as a reminder before the Lord at all times. ³⁰ Put into the chest pendant used for making decisions the Urim and the Thummim, so they will be over Aaron’s heart when he goes into the Lord’s presence. In this way, Aaron will carry the means to make decisions for the Israelites over his heart when in the Lord’s presence at all times.

Instructions for other priestly clothing

³¹ You will make the robe for the vest all of blue.