Leviticus 23:20-22

American Standard Version

²⁰ And the priest shall wave them with the bread of the first-fruits for a wave-offering before Jehovah, with the two lambs: they shall be holy to Jehovah for the priest. ²¹ And ye shall make proclamation on the selfsame day; there shall be a holy convocation unto you; ye shall do no servile work: it is a statute for ever in all your dwellings throughout your generations.

²² And when ye reap the harvest of your land, thou shalt not wholly reap the corners of thy field, neither shalt thou gather the gleaning of thy harvest: thou shalt leave them for the poor, and for the sojourner: I am Jehovah your God.