Exodus 28:21
28:21 The stones are to be for the names of the sons of Israel, twelve, according to the number of
their names. Each name according to the twelve tribes is to be like
the engravings of a seal.
Exodus 28:36
28:36 “You are to make a plate of pure gold and engrave on it the way a seal is engraved: “Holiness to the Lord.”