It certainly is not in the Bible and the rabbis may not have had it in mind, but a new ritual has grown up around Pesach. Just as on the nights of the Seder, so on the last night young children again stay up late - this time to welcome back their father ,with armfuls of bread from the kosher bakeries that re-open after the festival has gone out.
PS I'm told the morning after Pesach, the Brent Cross branch of Tesco's had run out of Bran Flakes and All-Bran.