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 Jehovah: and Aaron shall bear the judgment of the children of Israel upon his heart before Jehovah continually.

And in the bag you are to put the Urim and Thummim, so that they may be on Aaron's heart whenever he goes in before the Lord; and Aaron may have the power of making decisions for the children of Israel before the Lord at all times.

Και θελεις βαλει εις το περιστηθιον της κρισεως το Ουριμ και το Θουμμιμ, και θελουσιν εισθαι επι της καρδιας του Ααρων, οταν εισερχηται ενωπιον του Κυριου· και ο Ααρων θελει βασταζει την κρισιν των υιων Ισραηλ επι της καρδιας αυτου ενωπιον του Κυριου διαπαντος.

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.