Exodus 28:36–37
36 “You shall make ra plate of pure gold and engrave on it, like the engraving of a signet, s‘Holy to the Lord.’ 37 And you shall fasten it on the turban by a cord of blue. It shall be on the front of the turban.
Leviticus 8:9
9 And he set athe turban on his head, and con the turban, in front, he set the golden plate, the holy crown, as the Lord commanded Moses.
Numbers 6:7
7 kNot even for his father or for his mother, for brother or sister, if they die, shall he make himself unclean, because his separation to God is on his head.