Negative commandment · Lo Ta’aseh #128 of 613
Not to feed the meat of the Paschal sacrifice to an apostate Jew
שלא להאכיל בשר הפסח לישראל שנשתמד
The verse · Shemot 12:43
וַיֹּאמֶר ה׳ אֶל־מֹשֶׁה וְאַהֲרֹן זֹאת חֻקַּת הַפָּסַח כׇּל־בֶּן־נֵכָר לֹא־יֹאכַל בּוֹ
“And the Lord said to Moshe and Aharon, This is the ordinance of the passover: no stranger shall eat of it:”
The Rambam’s words
Not to feed the meat of the Paschal sacrifice to an apostate Jew, as [Exodus 12:43] states: "No outsider may eat from it." This refers to a Jew who has become assimilated among the gentiles and serves false gods, as they do. He must not partake [of the Paschal sacrifice].
שלא להאכיל בשר הפסח לישראל שנשתמד, שנאמר "כל בן נכר, לא יאכל בו" (שמות יב,מג); כלומר, ישראל שנלווה לבני נכר ועבד עבודה זרה כמותם לא יאכל בו.
Why · Sefer HaChinuch #13
That we not feed of the Pesach sacrifice to an apostate Jew
“From the roots of this commandment are so that the Jews will remember forever the great miracles that G-d performed for them during the exodus from Egypt.”
Who & when
“And [it] is practiced by males and females at the time of the [Temple], where there is a Pesach sacrifice.”
Where in the Mishneh Torah
Hilchot Paschal Offering הלכות קרבן פסח