Chasidut for Numbers 29:35

בַּיּוֹם֙ הַשְּׁמִינִ֔י עֲצֶ֖רֶת תִּהְיֶ֣ה לָכֶ֑ם כָּל־מְלֶ֥אכֶת עֲבֹדָ֖ה לֹ֥א תַעֲשֽׂוּ׃

On the eighth day ye shall have a solemn assembly: ye shall do no manner of servile work;