Exodus 39:8
"And he made the breastplate of cunning work, like the work of the ephod; of gold, blue, and purple, and scarlet, and fine twined linen."
Cross References (ranked by relevance)
And these are the garments which they shall make; a breastplate, and an ephod, and a robe, and a broidered coat, a mitre, and a girdle: and they shall make holy garments for Aaron thy brother, and his sons, that he may minister unto me in the priest’s office.
For he put on righteousness as a breastplate, and an helmet of salvation upon his head; and he put on the garments of vengeance for clothing, and was clad with zeal as a cloak.
Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness;
My mercy will I keep for him for evermore, and my covenant shall stand fast with him.