Exodus 12:45

And the LORD said unto Moses and Aaron, This is the ordinance of the passover: There shall no stranger eat thereof:

But every man’s servant that is bought for money, when thou hast circumcised him, then shall he eat thereof.

In one house shall it be eaten; thou shalt not carry forth ought of the flesh abroad out of the house; neither shall ye break a bone thereof.

All the congregation of Israel shall keep it.