Comentário sobre Êxodo 12:4

ואם ימעט הבית מהיות משה — This means: if they are too few to be sufficient for one lamb — that they are unable to eat the whole of it, and it would therefore come under the category of נותר “left over”. ולקח הוא ושכנו וגו׳ THEN LET HIM AND HIS NEIGHBOUR TAKE etc. — This is what these words and those that precede it imply in its literal sense, but there is also a derivation from it of a Halachic character — that the verse intends to teach that after they have counted themselves (formed themselves into a company) for it, they may reduce their number by withdrawing from it and may register themselves for a different lamb; but if they intend to withdraw and thereby reduce their number מהיות משה — they must reduce only whilst the lamb is still in being — whilst it is alive (מחיות משה = מהיות משה) — and not after it has been slaughtered (Pesachim 89a; cf. Mekhilta d'Rabbi Yishmael 12:4:1).

ושכנו הקרוב אל ביתו. Even though numerous Egyptian families might have lived between the house of the Israelite and the nearest house occupied by another Israelite, such an Israelite is described by the Torah as “his neighbour,” seeing that he is closer to his house than the houses of other Jews.

ואם ימעט הבית, If the household be too small, etc. This verse can be explained satisfactorily both according to the view of Rabbi Yossi and the view of Rabbi Yehudah who have conflicting views reported in Pessachim 99 in a situation where the two lambs of two different families have become mixed up and the members of the respective families are not sure to which animal they belong. According to Rabbi Yehudah it is sufficient if one member of each family partakes of both animals in order to fulfil the condition laid down in our verse, i.e. if the number of people originally designated to eat from one lamb had somehow shrunk. Rabbi Yehudah considers the operative part of the verse אם ימעט הבית מהיות משה as the diminutive word ימעט, reduced number, but not total absence. Rabbi Yossi holds that as long as either one of the two animals is not temporarily without anyone committed to eat from it, neither one is disqualified. Rabbi Yossi pays especial attention to the words מהיות משה, i.e. to leave that lamb as temporarily not belonging to anyone.