Exodus 28:35-37

35Aaron must wear the robe when he is serving the Lord. The bells will make a noise when he goes into the Holy Place to serve the Lord. They will also make a sound when he comes out. Then he will not die.

36Use pure gold to make a thin plate and write on it carefully with a sharp tool. Write this sign on it: “Holy to the Lord”.

37Fix a blue string to the plate and tie it to the front of the linen hat.