And if the household be too little for the lamb, let him and his neighbour next unto his house take it according to the number of the souls; every man according to his eating shall make your count for the lamb. If the household be too little - That is, if there be not persons enough in one family to eat a whole lamb, then two families must join together. The rabbins allow that there should be at least ten persons to one paschal lamb, and not more than twenty.
Take it, according to the number of the souls - The persons who were to eat of it were to be first ascertained, and then the lamb was to be slain and dressed for that number.