וְשַׂמְתָּ֥ הַמִּצְנֶ֖פֶת עַל־רֹאשׁ֑וֹ וְנָתַתָּ֛ אֶת־נֵ֥זֶר הַקֹּ֖דֶשׁ עַל־הַמִּצְנָֽפֶת׃
And thou shalt set the mitre upon his head, and put the holy crown upon the mitre.
Read kabbalistic (mystical) interpretation of Exodus 29:6: and classical mystical sources.