וְצִפִּיתָ֥ אֹת֖וֹ זָהָ֣ב טָה֑וֹר וְעָשִׂ֥יתָ לּ֛וֹ זֵ֥ר זָהָ֖ב סָבִֽיב׃
And thou shalt overlay it with pure gold, and make thereto a crown of gold round about.
Read kabbalistic (mystical) interpretation of Exodus 25:24: and classical mystical sources.