Exodus 23:11
But the seventh year you shall let it rest and lie still; that the poor of your people may eat: and what they leave the beasts of the field shall eat. In like manner you shall deal with your vineyard, and with your olive grove.
Torrey's Topical Textbook—AKJV

Leviticus 19:9,10
And when you reap the harvest of your land, you shall not wholly reap the corners of your field, neither shall you gather the gleanings of your harvest.
Torrey's Topical Textbook—AKJV