Leviticus 23:36

For seven days you shall present an offering by fire to Yahweh. On the eighth day you shall have a holy convocation and present an offering by fire to Yahweh; it is an assembly. You shall do no laborious work.

Leviticus 23:39

On exactly the fifteenth day of the seventh month, when you have gathered in the crops of the land, you shall celebrate the feast of Yahweh for seven days, with a rest on the first day and a rest on the eighth day.