Negative commandment · Lo Ta’aseh #188 of 613
Not to partake of the meat of an ox that was stoned to death
שלא לאכול בשר שור הנסקל
The verse · Shemot 21:28
וְכִי־יִגַּח שׁוֹר אֶת־אִישׁ אוֹ אֶת־אִשָּׁה וָמֵת סָקוֹל יִסָּקֵל הַשּׁוֹר וְלֹא יֵאָכֵל אֶת־בְּשָׂרוֹ וּבַעַל הַשּׁוֹר נָקִי
“If an ox gore a man or a woman, that they die: then the ox shall be surely stoned, and his flesh shall not be eaten; but the owner of the ox shall be acquitted.”
The Rambam’s words
Not to partake of the meat of an ox that was stoned to death, as [Exodus 21:28] states: "And do not eat its flesh."
שלא לאכול בשר שור הנסקל, שנאמר "ולא ייאכל את בשרו" (שמות כא,כח).
Why · Sefer HaChinuch #52
Not to eat from the meat of an ox that was stoned
“It is from the roots of the commandment [that it is] in order to establish in our mind that anyone that has a mishap happen through him is distanced and disgusting for G-d and for people; even if it is inadvertent — like with an animal that has no intelligence — and all the more so, if it is volitional.”
Who & when
“And the commandment of the prohibition of its meat is practiced by males and females.”
Where in the Mishneh Torah
Hilchot Forbidden Foods הלכות מאכלות אסורות