Deuteronomy 31:9-11

So Moses wrote down this law and gave it to the Levitical priests, who carried the ark of the covenant of the LORD, and to all the elders of Israel. Then Moses commanded them: “At the end of every seven years, in the year for canceling debts, during the Festival of Tabernacles, when all Israel comes to appear before the LORD your God at the place he will choose, you shall read this law before them in their hearing.