If a stranger shall sojourn with you and would keep the Passover to the LORD, let all his males be circumcised. Then he may come near and keep it; he shall be as a native of the land. But no uncircumcised person shall eat of it.
Some further precepts are here given concerning the passover, as it should be observed in times to come. I. All the congregation of Israel must keep it, Exo 12:47. All that share in God's mercies should join in thankful praises for them. Though it was observed in families apart, yet it is looked upon as the act of the whole congregation; for the smaller communities constituted the greater.
Commenting on Exodus 12:43-51
UNLEAVENED BREAD. (Exo. 12:15-51) Seven days shall ye eat unleavened bread, &c.--This was to commemorate another circumstance in the departure of the Israelites, who were urged to leave so hurriedly that their dough was unleavened (Exo 12:39), and they had to eat unleavened cakes (Deu 16:3).
Commenting on Exodus 12:15-51
And when a stranger - will keep the passover, etc. - Let all who sojourn among you, and who desire to partake of this sacred ordinance, not only be circumcised themselves, but all the males of their families likewise, that they may all have an equal right to the blessings of the covenant.