Matthew 9:37

Then he said to his disciples: The harvest is abundant, but the laborers are few.

Luke 10:2

He said, therefore, to them: The harvest truly is great, but the laborers are few; pray, therefore, the Lord of the harvest that he send out laborers into his harvest.

Matthew 28:19

Go, therefore, make disciples of all nations, immersing them (the disciples) into the name of the Father, and of the Son, and of the Holy Spirit;

Mark 16:15

And he said to them: Go into all the world, and preach the gospel to every creature.

Luke 24:47

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

John 4:35-36

Do you not say, There are yet four months, and harvest comes? Behold, I say to you, Lift up your eyes, and look on the fields, for they are already white for the harvest.

Acts 16:9

And, during the night, a vision appeared to Paul. A certain man of Macedonia stood and besought him, saying: Come over to Macedonia and help us.

Acts 18:10

for I am with you, and no one shall make an assault upon you, to injure you; for I have many people in this city.

1 Corinthians 3:9

For we are fellow-laborers for God: you are God's field, you are God's building.

2 Corinthians 6:1

As co-workers with him, we beseech you, that you receive not the grace of God in vain:

Philippians 2:19-21

But I trust in the Lord Jesus, to send Timothy shortly to you, that I also may be refreshed by knowing your condition;

Colossians 4:11

Jesus also, who is called Justus, salutes you: these are of the circumcision: and these only are my fellow-workers for the kingdom of God, who have been a comfort to me.

1 Thessalonians 5:12-13

Now we beseech you, brethren, to have regard for those who labor among you, and preside over you in the Lord, and admonish you,

1 Timothy 5:17

Let the elders who rule well, be counted worthy of double honor, especially those who labor in word and teaching.

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, therefore, make disciples of all nations, immersing them (the disciples) into the name of the Father, and of the Son, and of the Holy Spirit;
Mark 16:15
And he said to them: Go into all the world, and preach the gospel to every creature.
Luke 10:2
He said, therefore, to them: The harvest truly is great, but the laborers are few; pray, therefore, the Lord of the harvest that he send out laborers into his harvest.
Luke 24:47
and that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
John 4:35
Do you not say, There are yet four months, and harvest comes? Behold, I say to you, Lift up your eyes, and look on the fields, for they are already white for the harvest.
Acts 16:9
And, during the night, a vision appeared to Paul. A certain man of Macedonia stood and besought him, saying: Come over to Macedonia and help us.
Acts 18:10
for I am with you, and no one shall make an assault upon you, to injure you; for I have many people in this city.

But

1 Corinthians 3:9
For we are fellow-laborers for God: you are God's field, you are God's building.
2 Corinthians 6:1
As co-workers with him, we beseech you, that you receive not the grace of God in vain:
Philippians 2:19
But I trust in the Lord Jesus, to send Timothy shortly to you, that I also may be refreshed by knowing your condition;
Colossians 4:11
Jesus also, who is called Justus, salutes you: these are of the circumcision: and these only are my fellow-workers for the kingdom of God, who have been a comfort to me.
1 Thessalonians 5:12
Now we beseech you, brethren, to have regard for those who labor among you, and preside over you in the Lord, and admonish you,
1 Timothy 5:17
Let the elders who rule well, be counted worthy of double honor, especially those who labor in word and teaching.