if a stranger shall sojourn among you, and will keep the passover - Gentile converts, or proselytes, as they were afterwards called, were admitted, if circumcised, to the same privileges as native Israelites, and were liable to excommunication if they neglected the passover. But circumcision was an indispensable condition; and whoever did not submit to that rite, was prohibited, under the sternest penalties, from eating the passover.