וְ֠הָיָה אִם־שָׁמֹ֨עַ תִּשְׁמְע֤וּן אֵלַי֙ נְאֻם־יְהוָ֔ה לְבִלְתִּ֣י ׀ הָבִ֣יא מַשָּׂ֗א בְּשַׁעֲרֵ֛י הָעִ֥יר הַזֹּ֖את בְּי֣וֹם הַשַּׁבָּ֑ת וּלְקַדֵּשׁ֙ אֶת־י֣וֹם הַשַּׁבָּ֔ת לְבִלְתִּ֥י עֲשֽׂוֹת־בה [בּ֖וֹ] כָּל־מְלָאכָֽה׃
And it shall come to pass, if ye diligently hearken unto Me, saith the LORD, to bring in no burden through the gates of this city on the sabbath day, but to hallow the sabbath day, to do no work therein;
Read kabbalistic (mystical) interpretation of Jeremiah 17:24: and classical mystical sources.