Sefer HaChinukh 15

Not to take out from the meat of the Pesach-offering outside: Not to take from the meat of the Pesach-offering out of the place of the assemblage (Pesachim 85b), as it is stated (Exodus 12:46), “you shall not take any of the meat outside the house.”

From the roots of this commandment is that which we have written — to remember the miracles of Egypt. And since we were made into free men and lords, this commandment came to us that we should eat [it] in the place of the assemblage and not take it outside — like the kings of the land. As everything that is prepared for them is eaten in their chambers with their large retinues. But when the poor of the land prepare a large meal, they send portions to their friends outside, since it is a novelty for them (to have a lavish meal).

The laws of the commandment — for example, what is the law of [the] meat when he takes [it] out (Pesachim 85a); the border that they must make (Mishneh Torah, Laws of Paschal Offering 9:3); the law of a partition between two assemblages that is breached (Pesachim 60b); and the rest of its details — are [all] elucidated in Pesachim.

And [it] is practiced at the time of the [Temple] by males and females. And one who transgresses it and takes of the meat outside violates a negative commandment. And we administer lashes for it — and that is when he dislodges [it] from the house and places [it] outside, like the well-known law about [carrying on] Shabbat (Pesachim 60b).