Exodus 12:4

But if the number is less than may suffice to be able to consume the lamb, he shall accept his neighbor, who has been joined with his house according to the number of souls that may suffice to be able to eat the lamb

Other versions

King James Version

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.

English Standard Version

And if the household is too small for a lamb, then he and his nearest neighbor shall take according to the number of persons; according to what each can eat you shall make your count for the lamb.

New International Version

If any household is too small for a whole lamb, they must share one with their nearest neighbor, having taken into account the number of people there are. You are to determine the amount of lamb needed in accordance with what each person will eat.