Daniel 4:18 Kabbalah

וְעָפְיֵ֤הּ שַׁפִּיר֙ וְאִנְבֵּ֣הּ שַׂגִּ֔יא וּמָז֨וֹן לְכֹ֖לָּא־בֵ֑הּ תְּחֹת֗וֹהִי תְּדוּר֙ חֵיוַ֣ת בָּרָ֔א וּבְעַנְפ֕וֹהִי יִשְׁכְּנָ֖ן צִפֲּרֵ֥י שְׁמַיָּֽא׃

whose leaves were fair, and the fruit thereof much, and in it was food for all; under which the beasts of the field dwelt, and upon whose branches the fowls of the heaven had their habitation;

Read kabbalistic (mystical) interpretation of Daniel 4:18: and classical mystical sources.