What does the wise [son] say? "What are these testimonies, statutes and judgments that Hashem our G-d commanded you?" (Deuteronomy 6:20). And accordingly you will say to him, the laws of the Pesach [sacrifice], "We may not eat an Afikoman [a dessert, or other foods eaten after the meal] after [we are finished eating] the Pesach sacrifice" (Mishnah Pesachim 10:8).