Leviticus 23:43 DBY

⁴¹  And ye shall celebrate it as a feast to Jehovah seven days in the year: [it is] an everlasting statute throughout your generations; in the seventh month shall ye celebrate it.

⁴²  In booths shall ye dwell seven days; all born in Israel shall dwell in booths;

⁴³  that your generations may know that I caused the children of Israel to dwell in booths, when I brought them out of the land of Egypt: I am Jehovah your God.

⁴⁴  And Moses declared the set feasts of Jehovah to the children of Israel.