John 4:35

is it not a common saying, "t'other four months, and then comes harvest?" lift up your eyes now, I say, and look on the fields; for they are white already to harvest.

Matthew 9:37-38

the harvest indeed is plentiful, but the labourers are few:

Luke 10:2-3

and he said to them, the harvest indeed is great, but the labourers are few: intreat therefore the Lord of the harvest to send forth labourers into his harvest.

John 4:30

so they went out of the city, and came to him.

Treasury of Scripture Knowledge

Summary

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.

Bible References

For

John 4:30
so they went out of the city, and came to him.
Matthew 9:37
the harvest indeed is plentiful, but the labourers are few:
Luke 10:3
go then: I send you as lambs among wolves.