Sforno on Exodus 12:4/ספורנו על שמות י״ב:ד׳

1ושכנו 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.