Matthew 9:37

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

Luke 10:2

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.

Matthew 28:19

go and instruct all nations, baptizing them in the name of the father, and of the son, and of the holy ghost:

Mark 16:15

Then he said to them, go ye into all parts of the world, and preach the gospel to all mankind.

Luke 24:47

and that repentance and remission of sins should be preach'd in his name, among all nations, beginning at Jerusalem.

John 4:35-36

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.

Acts 16:9

there Paul had a vision in the night. a Macedonian appear'd to him, and thus address'd him, "pass on to Macedonia, and come to our relief."

Acts 18:10

(since I am with thee, and no man shall lift up his hand so as to hurt thee:) for my people in this city are numerous."

1 Corinthians 3:9

For we are fellow labourers employed by God: you are his field, and his mansion.

2 Corinthians 6:1

Invested then with such a commission, I beseech you let not the offers of divine favour be made to you in vain.

Philippians 2:19-21

However, I hope by the favour of the Lord Jesus to send Timothy to you very soon, that I may have some encouragement by knowing the state of your affairs:

Colossians 4:11

Jesus, who is called Justus, salutes you: these are the only Jews who by assisting me in preaching the gospel,

1 Thessalonians 5:12-13

We entreat you, brethren, to respect those, who labour in the ministry, who by divine appointment preside over you, and instruct you.

1 Timothy 5:17

Let the presbyters that govern well receive a double salary, especially those who are employ'd in preaching and instructing.

Treasury of Scripture Knowledge

Summary

Then saith he unto his disciples, The harvest truly is plenteous, but the labourers are few;

Bible References

The harvest

Matthew 28:19
go and instruct all nations, baptizing them in the name of the father, and of the son, and of the holy ghost:
Mark 16:15
Then he said to them, go ye into all parts of the world, and preach the gospel to all mankind.
Luke 10:2
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.
Luke 24:47
and that repentance and remission of sins should be preach'd in his name, among all nations, beginning at Jerusalem.
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.
Acts 16:9
there Paul had a vision in the night. a Macedonian appear'd to him, and thus address'd him, "pass on to Macedonia, and come to our relief."
Acts 18:10
(since I am with thee, and no man shall lift up his hand so as to hurt thee:) for my people in this city are numerous."

But

1 Corinthians 3:9
For we are fellow labourers employed by God: you are his field, and his mansion.
2 Corinthians 6:1
Invested then with such a commission, I beseech you let not the offers of divine favour be made to you in vain.
Philippians 2:19
However, I hope by the favour of the Lord Jesus to send Timothy to you very soon, that I may have some encouragement by knowing the state of your affairs:
Colossians 4:11
Jesus, who is called Justus, salutes you: these are the only Jews who by assisting me in preaching the gospel,
1 Thessalonians 5:12
We entreat you, brethren, to respect those, who labour in the ministry, who by divine appointment preside over you, and instruct you.
1 Timothy 5:17
Let the presbyters that govern well receive a double salary, especially those who are employ'd in preaching and instructing.