Leviticus 23:44

41. And yee shall keepe it a feast vnto the Lord seuen dayes in the yeere: It shalbe a Statute for euer in your generations, ye shall celebrate it in the seuenth moneth. 42. Ye shall dwell in boothes seuen dayes: all that are Israelites borne, shall dwell in boothes; 43. That your generations may know that I made the children of Israel to dwell in boothes, when I brought them out of the land of Egypt: I am the Lord your God. 44. And Moses declared vnto the children of Israel the feastes of the Lord.