עַל־כֵּ֛ן אָנֹכִ֥י מְצַוְּךָ֖ לֵאמֹ֑ר שָׁלֹ֥שׁ עָרִ֖ים תַּבְדִּ֥יל לָֽךְ׃ (ס)
Wherefore I command thee, saying: ‘Thou shalt separate three cities for thee.’
Read kabbalistic (mystical) interpretation of Deuteronomy 19:7: and classical mystical sources.