וְשָׁפְט֣וּ אֶת־הָעָם֮ בְּכָל־עֵת֒ וְהָיָ֞ה כָּל־הַדָּבָ֤ר הַגָּדֹל֙ יָבִ֣יאוּ אֵלֶ֔יךָ וְכָל־הַדָּבָ֥ר הַקָּטֹ֖ן יִשְׁפְּטוּ־הֵ֑ם וְהָקֵל֙ מֵֽעָלֶ֔יךָ וְנָשְׂא֖וּ אִתָּֽךְ׃
And let them judge the people at all seasons; and it shall be, that every great matter they shall bring unto thee, but every small matter they shall judge themselves; so shall they make it easier for thee and bear the burden with thee.
Read kabbalistic (mystical) interpretation of Exodus 18:22: and classical mystical sources.