If they say, Come with us, let us lay wait for blood, let us lurk privily for the innocent without cause: If they say, Come with us - From all accounts, this is precisely the way in which the workers of iniquity form their partisans, and constitute their marauding societies to the present day.
Let us lay wait for blood - Let us rob and murder.
Let us lurk privily - Let us lie in ambush for our prey.