Leviticus 19:10

‘When you reap the harvest of your land, moreover, you shall not reap to the very corners of your field nor gather the gleaning of your harvest; you are to leave them for the afflicted and the sojourner. I am Yahweh your God.’”

“When you reap your harvest in your field and have forgotten a sheaf in the field, you shall not go back to get it; it shall be for the sojourner, for the orphan, and for the widow, in order that Yahweh your God may bless you in all the work of your hands.

“When you beat your olive tree, you shall not go over the boughs after you finish; it shall be for the sojourner, for the orphan, and for the widow.

And Ruth the Moabitess said to Naomi, “Please let me go to the field and glean among the ears of grain after one whom I may find favor in his eyes.” And she said to her, “Go, my daughter.”