A lady calls the Rabbi at 10 pm Erev Pesach.
Wife: "Rabbi!, we scattered ten pieces of bread around the house, and my husband only found nine of them. What should we do?"
Rabbi: Is the bread the size of kezayit
Wife: Yes.
Rabbi: So he has to find it!!
At midnight, she calls again.
Wife: Rabbi!, my husband has already dismantled all the closets, taken out the rugs, turned over the furniture, and nothing. He can not find the tenth piece of chametz!
Rabbi: There's nothing to do. He must search until he finds it.
2:00 am she calls again.
Wife: Dear Rabbi, we are all tired. My husband has searched 702 times as a gematria of Shabbat, searched on the roof, opened the plumbing, everything, and still has not found it. What can we do?
Rabbi: If it's a kazayit, there is no choice. He has to find it!
Wife: Can I at least give him a hint?