Exodus 28:27-29

Living Bible

²⁷ also make two other gold rings for the bottom front edge of the ephod at the sash. ²⁸ Now attach the bottom of the chestpiece to the bottom rings of the ephod by means of blue ribbons; this will prevent the chestpiece from coming loose from the ephod. ²⁹ In this way Aaron shall carry the names of the tribes of Israel on the chestpiece over his heart (it is God’s oracle) when he goes into the Holy Place; thus Jehovah will be reminded of them continually.