It must be eaten inside one house. You are not to take any of the meat outside the house, and you may not break any of the bones.
46. Neither shall ye break a bone thereof. I am not certain why God desired no bone to be broken; unless that this might also be a sign of haste; because people at table seldom partake of the marrow, unless when their entertainment is protracted.
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
Thus did all the children of Israel,.... They slew a lamb, and roasted and ate it, with unleavened bread, and bitter herbs, and took a bunch of hyssop, and dipped it in the blood, and struck the lintel and the side posts of the doors of their houses: this they did on the night of their deliverance out of Egypt: as the Lord commanded Moses...