Leviticus 24:9 Kabbalah

וְהָֽיְתָה֙ לְאַהֲרֹ֣ן וּלְבָנָ֔יו וַאֲכָלֻ֖הוּ בְּמָק֣וֹם קָדֹ֑שׁ כִּ֡י קֹדֶשׁ֩ קָֽדָשִׁ֨ים ה֥וּא ל֛וֹ מֵאִשֵּׁ֥י יְהוָ֖ה חָק־עוֹלָֽם׃ (ס)

And it shall be for Aaron and his sons; and they shall eat it in a holy place; for it is most holy unto him of the offerings of the LORD made by fire, a perpetual due.’

Read kabbalistic (mystical) interpretation of Leviticus 24:9: and classical mystical sources.