Leviticus 23:39-40 ▼

39 ‘On exactly the fifteenth day of the seventh month, when you have gathered in the produce 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.

40 And on the first day you shall take for yourselves the foliage of beautiful trees, palm branches and boughs of leafy trees and willows of the brook, and you shall be glad before Yahweh your God for seven days.