Deuteronomy 31:9-11

So Moses wrote this law and gave it to the priests, the sons of Levi who carried the ark of the covenant of the LORD, and to all the elders of Israel. Then Moses commanded them, saying, “At the end of every seven years, at the time of year when debts are forgiven, at the Feast of Booths (Tabernacles), when all Israel comes to appear before the LORD your God in the place which He chooses, you shall read this law before all [the people of] Israel so that they may hear.