Leviticus 23:20-28

²⁰And the priest shall place them with the loaves of the firstfruits an offering before the Lord with the two lambs, they shall be holy to the Lord; they shall belong to the priest that brings them.

²¹And ye shall call this day a convocation: it shall be holy to you; ye shall do no servile work on it: it is a perpetual ordinance throughout your generations in all your habitations.

²²And when ye shall reap the harvest of your land, ye shall not fully reap the remainder of the harvest of your field when thou reapest, and thou shalt not gather that which falls from thy reaping; thou shalt leave it for the poor and the stranger: I am the Lord your God.

²³And the Lord spoke to Moses, saying,

²⁴Speak to the children of Israel, saying, In the seventh month, on the first day of the month, ye shall have a rest, a memorial of trumpets: it shall be to you a holy convocation.

²⁵Ye shall do no servile work, and ye shall offer a whole burnt offering to the Lord.

²⁶And the Lord spoke to Moses, saying,

²⁷Also on the tenth day of this seventh month is a day of atonement: it shall be a holy convocation to you; and ye shall humble your souls, and offer a whole burnt offering to the Lord.

²⁸Ye shall do no work on this selfsame day: for this is a day of atonement for you, to make atonement for you before the Lord your God.