Deuteronomy 24:19

When thou cuttest down thine harvest - This is an addition to the law, Leviticus 19:9 ; Leviticus 23:22 . The corners of the field, the gleanings, and the forgotten sheaf, were all the property of the poor. This the Hebrews extended to any part of the fruit or produce of a field, which had been forgotten in the time of general ingathering, as appears from the concluding verses of this chapter.