Leviticus 23:20-23

²⁰And the priest shall uplift them with the bread of the firstfruits an elevation before the Lord; with the two lambs they (the loaves) shall be consecrated before the Lord for the priest.

²¹And on this same day you shall proclaim (that) it shall be a holy convocation to you. Ye shall do no work of labour. (This is) an everlasting statute in all your dwellings unto your generations.

²²And when you reap the harvest of your land, thou shalt not entirely finish the corner of thy field in thy reaping, nor shalt thou gather up the gleanings of thy harvest; for the poor and for the stranger thou shalt leave them: I am the Lord your God.

²³And the Lord spake with Mosheh, saying: