Levítico 23

15 And count to you, after the festival day, from the day that you brought the omera of the elevation, seven weeks, complete shall they be.

22 And 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.