Negative commandment · Lo Ta’aseh #323 of 613
Not to work on the first day of Pesach
שלא לעשות מלאכה בראשון של פסח
The verse · Shemot 12:16
וּבַיּוֹם הָרִאשׁוֹן מִקְרָא־קֹדֶשׁ וּבַיּוֹם הַשְּׁבִיעִי מִקְרָא־קֹדֶשׁ יִהְיֶה לָכֶם כׇּל־מְלָאכָה לֹא־יֵעָשֶׂה בָהֶם אַךְ אֲשֶׁר יֵאָכֵל לְכׇל־נֶפֶשׁ הוּא לְבַדּוֹ יֵעָשֶׂה לָכֶם
“And on the first day there shall be a holy gathering, and on the seventh day there shall be a holy gathering to you; no manner of work shall be done on them, save that which every person must eat, that only may be done by you.”
The Rambam’s words
Not to work on the first day of Pesach, as [Leviticus 23:7] states concerning it: "Do not do any servile work on these [days]."
שלא לעשות מלאכה בראשון של פסח, שנאמר "כל מלאכה, לא ייעשה בהם" (שמות יב,טז).
Why · Sefer HaChinuch #298
To not do work on the first day of Pesach
“It is from the roots of the commandment that it is so that the great miracles that G-d, may He be blessed, did for them and for their forefathers be remembered, and that they speak about them and inform their children and the children of their children about them.”
Who & when
“And it is practiced in every place and at all times by males and females.”
Where in the Mishneh Torah
Hilchot Rest on a Holiday הלכות שביתת יום טוב