Deuteronomy 31:10

10Then Moses commanded them, “At the end of every seven years, at the appointed time in the year of remission of debt, during the Feast of Tabernacles,31:10 That is, Sukkot, the autumn feast of pilgrimage to Jerusalem; also translated as the Feast of Booths or the Feast of Shelters and originally called the Feast of Ingathering(see Exodus 23:16 and Exodus 34:22).