Leviticus 23:34

Speak unto the children of Israel, saying, The fifteenth day, &c.— The next solemn meeting was called the feast of tabernacles, upon which they dwelt for seven days in booths or tabernacles, to commemorate their having dwelt for forty years in tabernacles in the wilderness, Leviticus 23:42. This was one reason of the institution: another is given in the 39th verse; and the typical view respects his birth and dwelling in the tabernacle of human flesh, who, in the fulness of time, was born, as it is commonly supposed, at the time of this festival; see John 1:14.