Leviticus 23:37-39

Douay-Rheims 1899 American Edition

³⁷ These are the feasts of the Lord, which you shall call most solemn and most holy, and shall offer on them oblations to the Lord, holocausts and libations according to the rite of every day,

³⁸ Besides the sabbaths of the Lord, and your gifts, and those things that you offer by vow, or which you shall give to the Lord voluntarily.

³⁹ So from the fifteenth day of the seventh month, when you shall have gathered in all the fruits of your land, you shall celebrate the feast of the Lord seven days: on the first day and the eighth shall be a sabbath, that is a day of rest.