Deuteronomy 31:9-11

So Moses wrote down these teachings and gave them to the priests and all the elders of Israel. (The priests are the sons of Levi, who carry the Ark of the Agreement with the LORD.) Then Moses commanded them: “Read these teachings for all Israel to hear at the end of every seven years, which is the year to cancel what people owe. Do it during the Feast of Shelters, when all the Israelites will come to appear before the LORD your God and stand at the place he will choose.