יוֹמָ֤ם וָלַ֗יְלָה יְסוֹבְבֻ֥הָ עַל־חוֹמֹתֶ֑יהָ וְאָ֖וֶן וְעָמָ֣ל בְּקִרְבָּֽהּ׃
Day and night they go about it upon the walls thereof; iniquity also and mischief are in the midst of it.
Read kabbalistic (mystical) interpretation of Psalms 55:11: and classical mystical sources.