And he put the breastplate upon him: also he put in the breastplate the Urim and the Thummim. He put in the breastplate the Urim and the Thummim - The Urim and Thummim are here supposed to be something different from the breastplate itself. See Clarke's note on Exodus 28:15, See Clarke's note on Exodus 28:16, See Clarke's note on Exodus 28:30.
Related Commentaries of Leviticus 8:8
Leviticus 8:8
8 And he put the breastplate upon him: also he put in the breastplate the Urim and the Thummim.