To harvest grain using a sickle (Ruth 2:3-9). Reaping is used as a symbol of recompense for good (Hosea 10:12; Galatians 6:7-10) and evil (Job 4:8; Proverbs 22:8; Hosea 8:7; Hosea 10:13), of evangelism (Matthew 9:37-38; Luke 10:2; John 4:35-38), and of final judgment (Matthew 13:30,Matthew 13:39; Revelation 14:14-16).
Butler, Trent C. Editor.. "Entry for 'REAP'". "Holman Bible Dictionary".