וּמִֽמִּשְׁפְּח֖וֹת בְּנֵ֣י קְהָ֑ת וַיְהִי֙ עָרֵ֣י גְבוּלָ֔ם מִמַּטֵּ֖ה אֶפְרָֽיִם׃
And some of the families of the sons of Kohath had cities of their borders out of the tribe of Ephraim.
Read kabbalistic (mystical) interpretation of I Chronicles 6:51: and classical mystical sources.