John 4:35
Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.
Cross-reference
John 4:30 reports the Samaritans coming to Jesus, showing the harvest Jesus just spoke of beginning immediately.
Matthew 9:37 uses the same 'harvest is plentiful' metaphor for people ready to respond to the gospel.
Matthew 9:38 adds the call to pray for workers, expanding the harvest imagery into a mission mandate.
Luke 10:2 uses the exact same harvest-plentiful/laborers-few language Jesus uses here, reinforcing the urgency of evangelistic workers.
Amos 9:13 describes an abundant harvest when plowing overlaps reaping—an image of eschatological blessing that Jesus applies to the present spiritual harvest of souls.
1 Corinthians 3:9 calls believers God's field, directly aligning with the field image in John 4:35—the field is people ready for harvest.
1 Corinthians 9:10 speaks of the plowman and thresher working in hope of sharing the crop—this echoes the harvest labor theme in John 4:35.
2 Timothy 2:6 says the hardworking farmer gets the first share of crops—reinforcing the principle of labor in the harvest, as urged in John 4:35.