פּירוש אויף דברים 16:13

באספך [THOU SHALT KEEP THE FESTIVAL OF TABERNACLES …] AFTER THAT THOU HAST GATHERED IN THE PRODUCE — i.e. at the usual harvest time, when thou bringest into the house the summer fruits. Another explanation is: באספך מגרנך ומיקבך teaches that one should cover the Succah only with the פסולת (lit., the chips, — that which falls off) of the barn and the wine-press [i.e. with vegetable matter] (Rosh Hashanah 13a; Sukkah 12a).

חג הסוכות, “the festival of huts;” this has also been repeated on account of the words: “in the place that the Lord will choose, i.e. Jerusalem.” (verse 15)

When you gather in from your threshing floor and your winepress whence the holiday is also called “the feast of ingathering” [Exodus 23: 16] .