Pharaoh argued, Come let us be shrewd with Israel lest they multiply…The Hebrew word for multiply is Nosaf, which sounds the same as Yosef-Joseph. There is a dark pun here, Pharaoh was warning his people that if they don't act shrewdly with Israel, not only will Israel multiply, but they may bring forth another character like Joseph. And so it was that the man who brought so much to Egypt was not just forgotten but remembered as a dangerous and destructive person.