Matthew 9:37

then saith he to his disciples, 'The harvest indeed is abundant, but the workmen few;

Luke 10:2

then said he unto them, 'The harvest indeed is abundant, but the workmen few; beseech ye then the Lord of the harvest, that He may put forth workmen to His harvest.

Psalm 68:11

The Lord doth give the saying, The female proclaimers are a numerous host.

Matthew 28:19

having gone, then, disciple all the nations, (baptizing them -- to the name of the Father, and of the Son, and of the Holy Spirit,

Mark 16:15

and he said to them, 'Having gone to all the world, proclaim the good news to all the creation;

Luke 24:47

and reformation and remission of sins to be proclaimed in his name to all the nations, beginning from Jerusalem:

John 4:35-36

do not say that it is yet four months, and the harvest cometh; lo, I say to you, Lift up your eyes, and see the fields, that they are white unto harvest already.

Acts 16:9

And a vision through the night appeared to Paul -- a certain man of Macedonia was standing, calling upon him, and saying, 'Having passed through to Macedonia, help us;' --

Acts 18:10

because I am with thee, and no one shall set on thee to do thee evil; because I have much people in this city;'

1 Corinthians 3:9

for of God we are fellow-workmen; God's tillage, God's building ye are.

2 Corinthians 6:1

And working together also we call upon you that ye receive not in vain the grace of God --

Philippians 2:19-21

And I hope, in the Lord Jesus, Timotheus to send quickly to you, that I also may be of good spirit, having known the things concerning you,

Colossians 4:11

and Jesus who is called Justus, who are of the circumcision: these only are fellow-workers for the reign of God who did become a comfort to me.

1 Thessalonians 5:12-13

And we ask you, brethren, to know those labouring among you, and leading you in the Lord, and admonishing you,

1 Timothy 5:17

The well-leading elders of double honour let them be counted worthy, especially those labouring 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
having gone, then, disciple all the nations, (baptizing them -- to the name of the Father, and of the Son, and of the Holy Spirit,
Mark 16:15
and he said to them, 'Having gone to all the world, proclaim the good news to all the creation;
Luke 10:2
then said he unto them, 'The harvest indeed is abundant, but the workmen few; beseech ye then the Lord of the harvest, that He may put forth workmen to His harvest.
Luke 24:47
and reformation and remission of sins to be proclaimed in his name to all the nations, beginning from Jerusalem:
John 4:35
do not say that it is yet four months, and the harvest cometh; lo, I say to you, Lift up your eyes, and see the fields, that they are white unto harvest already.
Acts 16:9
And a vision through the night appeared to Paul -- a certain man of Macedonia was standing, calling upon him, and saying, 'Having passed through to Macedonia, help us;' --
Acts 18:10
because I am with thee, and no one shall set on thee to do thee evil; because I have much people in this city;'

But

Psalm 68:11
The Lord doth give the saying, The female proclaimers are a numerous host.
1 Corinthians 3:9
for of God we are fellow-workmen; God's tillage, God's building ye are.
2 Corinthians 6:1
And working together also we call upon you that ye receive not in vain the grace of God --
Philippians 2:19
And I hope, in the Lord Jesus, Timotheus to send quickly to you, that I also may be of good spirit, having known the things concerning you,
Colossians 4:11
and Jesus who is called Justus, who are of the circumcision: these only are fellow-workers for the reign of God who did become a comfort to me.
1 Thessalonians 5:12
And we ask you, brethren, to know those labouring among you, and leading you in the Lord, and admonishing you,
1 Timothy 5:17
The well-leading elders of double honour let them be counted worthy, especially those labouring in word and teaching,