Exodus 28:28

28 The breastpiece shall be bound by its rings to the rings of the ephod with a blue cord, so that it may lie on the decorated band of the ephod, and so that the breastpiece shall not come loose from the ephod.

Exodus 28:28 In-Context

26 You shall make two rings of gold, and put them at the two ends of the breastpiece, on its inside edge next to the ephod.
27 You shall make two rings of gold, and attach them in front to the lower part of the two shoulder-pieces of the ephod, at its joining above the decorated band of the ephod.
28 The breastpiece shall be bound by its rings to the rings of the ephod with a blue cord, so that it may lie on the decorated band of the ephod, and so that the breastpiece shall not come loose from the ephod.
29 So Aaron shall bear the names of the sons of Israel in the breastpiece of judgment on his heart when he goes into the holy place, for a continual remembrance before the Lord.
30 In the breastpiece of judgment you shall put the Urim and the Thummim, and they shall be on Aaron's heart when he goes in before the Lord; thus Aaron shall bear the judgment of the Israelites on his heart before the Lord continually.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.