הלכה על פסחים 10:10

What differentiates this night from all [other] nights? On all other nights we don't dip even once; but tonight twice. On all other nights we eat chamets and matsa; but tonight it is all matsa. On all other nights we eat other vegetables; but tonight it is all bitter herbs. On all other nights we eat whether sitting or reclining; but tonight we are all reclining

What does the wise [son] say? "'What are these testimonies, statutes and judgments that the Lord our God commanded you?' (Deuteronomy 6:20)" And accordingly you will say to him, as per the laws of the Passover 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)."