שֵׁ֤שֶׁת יָמִים֙ תַּעֲבֹ֔ד וּבַיּ֥וֹם הַשְּׁבִיעִ֖י תִּשְׁבֹּ֑ת בֶּחָרִ֥ישׁ וּבַקָּצִ֖יר תִּשְׁבֹּֽת׃
Six days thou shalt work, but on the seventh day thou shalt rest; in plowing time and in harvest thou shalt rest.
Read midrashic interpretation of Exodus 34:21: and classical rabbinic exegesis.