Exodus 13:8

And thou shall show thy son in that day
On the first of the days of the feast of unleavened bread, the reason of eating it; and this is to be shown not to a son or single child only, but by parents to all their children, sons and daughters, and even unasked, as Maimonides ^F2 interprets it; and so Jarchi's note is, to a son that knows not how to ask or what to ask about, (See Gill on Exodus 12:26) (See Gill on Exodus 12:27): saying, this is done because of that which the Lord did unto me, when I
came forth out of Egypt:
that is, this unleavened bread is eaten because of the quick and speedy deliverance of Israel out of Egypt, so that they had not time to leaven their dough.