Exodus 28:37

37 Tie it with a blue cord to the front of the turban.

Exodus 28:37 In-Context

35 Aaron has to wear it when he does his priestly work. The bells will be heard when he enters the Holy Place and comes into the presence of God, and again when he comes out so that he won't die. The Turban, Tunic, Underwear
36 "Make a plate of pure gold. Engrave on it as on a seal: 'Holy to God.'
37 Tie it with a blue cord to the front of the turban.
38 It is to rest there on Aaron's forehead. He'll take on any guilt involved in the sacred offerings that the Israelites consecrate, no matter what they bring. It will always be on Aaron's forehead so that the offerings will be acceptable before God.
39 "Weave the tunic of fine linen. Make the turban of fine linen. The sash will be the work of an embroiderer.
Published by permission. Originally published by NavPress in English as THE MESSAGE: The Bible in Contemporary Language copyright 2002 by Eugene Peterson. All rights reserved.