Glean The corners of fields were not to be reaped, and the sheaf accidentally left behind was not to be fetched away, according to the law of Moses (Leviticus 19:9; Leviticus 1:23; Deuteronomy 24:21). They were to be left for the poor to glean. Similar laws were given regarding vineyards and oliveyards. (Comp. Ruth 2:2.)