Leviticus 23:34

34“Speak to the Israelites and say, ‘On the fifteenth day of the seventh month the Feast of Tabernacles23:34 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). to the Lord begins, and it continues for seven days.