בַּיּ֣וֹם הַה֗וּא יִֽהְיֶה֙ יְהוָ֣ה צְבָא֔וֹת לַעֲטֶ֣רֶת צְבִ֔י וְלִצְפִירַ֖ת תִּפְאָרָ֑ה לִשְׁאָ֖ר עַמּֽוֹ׃
In that day shall the LORD of hosts be For a crown of glory, and for a diadem of beauty, Unto the residue of His people;
Read kabbalistic (mystical) interpretation of Isaiah 28:5: and classical mystical sources.