Leviticus 23:44 YLT

⁴²  'In booths ye dwell seven days; all who are natives in Israel dwell in booths,

⁴³  so that your generations do know that in booths I caused the sons of Israel to dwell; in my bringing them out of the land of Egypt; I, Jehovah, 'am' your God.'

⁴⁴  And Moses speaketh 'concerning' the appointed seasons of Jehovah unto the sons of Israel.