Exodus

And of the blue, and purple, and scarlet, they made cloths of service, to do service in the holy place, and made the holy garments for Aaron; as the Lord commanded Moses.

And the cloths of service, and the holy garments for Aaron the priest, and the garments of his sons, to minister in the priest’s office,

And they tied unto it a lace of blue, to fasten it on high upon the mitre; as the Lord commanded Moses.

And take thou unto thee Aaron thy brother, and his sons with him, from among the children of Israel, that he may minister unto me in the priest’s office, even Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron’s sons.

And they shall be upon Aaron, and upon his sons, when they come in unto the tabernacle of the congregation, or when they come near unto the altar to minister in the holy place; that they bear not iniquity, and die: it shall be a statute for ever unto him and his seed after him.