Exodus 28:30-31

KJV_Cambridge(i) 30 And thou shalt put in the breastplate of judgment the Urim and the Thummim; and they shall be upon Aaron's heart, when he goeth in before the LORD: and Aaron shall bear the judgment of the children of Israel upon his heart before the LORD continually. 31 And thou shalt make the robe of the ephod all of blue.