Put the turban on his head and attach the holy diadem to the turban.

Exodus 28:4
These are the garments that they shall make: a breastpiece, an ephod, a robe, a woven tunic, a turban, and a sash. They are to make these holy garments for your brother Aaron and his sons, so that they may serve Me as priests.

Exodus 28:36
You are to make a plate of pure gold and engrave on it as on a seal: HOLY TO THE LORD.

Exodus 28:37
Fasten to it a blue cord to mount it on the turban; it shall be on the front of the turban.

Exodus 28:39
You are to weave the tunic with fine linen, make the turban of fine linen, and fashion an embroidered sash.

Leviticus 8:9
Moses also put the turban on Aaron's head and set the gold plate, the holy diadem, on the front of the turban, as the LORD had commanded him.

Leviticus 21:12
He must not leave or desecrate the sanctuary of his God, for the consecration of the anointing oil of his God is on him. I am the LORD.

And you shall put the turban on his head, and put the holy crown on the turban.