Harvest
Ancient Israel was an agricultural society. Life depended on sufficient rainfall and bountiful crops. Therefore, the idea of the harvest was useful in illustrating important concepts in the Bible. For example, actions have consequences-we reap what we sow. A good harvest starts with planting good seed. The Bible says the way of life that we followed before we knew Jesus Christ resulted in death, but a life of obedience to God produces a "harvest of righteousness" (Hebrews 12:11).

The Israelites' obedience to God results in good harvests and prosperity; disobedience brings poor harvests.
Leviticus 26:3-11
Deuteronomy 28:9-12; 38-42
2 Chronicles 32:26-29
Jeremiah 8:12-13
Our actions, good and bad, have consequences. We will reap what we sow.
Hosea 10:12-14
Romans 6:20-22
Galatians 6:7-10
The "harvest" sometimes describes those who will believe in Jesus Christ.
Matthew 9:37-38
John 4:35-38
Romans 1:11-13
The Bible sometimes uses the word "harvest" to symbolize to second coming of Jesus Christ to judge the world.
Joel 3:11-21
Matthew 13:24-30, 36-43
Revelation 14:14-20