1 Corinthians 9:16

For if I preach the gospel, yet I have no ground for boasting; because I am under necessity to do it: and wo is me if I do not preach the Gospel.

Romans 1:14

For I am a debtor both to Greeks and barbarians, both to the learned and the unlearned:

Acts 9:15

But the Lord said unto him, Go thy way, for he is the instrument I have chosen, to bear my name before the Gentiles, and kings, and the children of Israel:

Luke 9:62

But Jesus said unto him, No one, that hath put his hand to the plough and looketh back, is fit for the kingdom of God.

Acts 4:20

for we cannot but speak the things which we have seen and heard.

Acts 9:6

And he trembling and astonished said, Lord, what wilt Thou have me to do? And the Lord said unto him, Arise and go into the city, and it shall be told thee, what thou must do.

Acts 26:16-20

But rise, and stand on thy feet: for to this end have I appeared unto thee, to appoint thee a minister and a witness both of the things which thou hast seen, and of those for which I shall hereafter appear unto thee:

Romans 4:2

for if Abraham were justified by works, he hath something to boast of; but this he hath not before God:

Romans 15:17

I have therefore matter of glorying in Christ Jesus, as to the things of God.

Colossians 4:17

And say ye to Archippus, Look well to the ministry, which thou hast received of the Lord, that thou fulfil it.

Treasury of Scripture Knowledge

Summary

For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me; yea, woe is unto me, if I preach not the gospel!

General references

Bible References

I have

Romans 4:2
for if Abraham were justified by works, he hath something to boast of; but this he hath not before God:
Romans 15:17
I have therefore matter of glorying in Christ Jesus, as to the things of God.

For

Acts 4:20
for we cannot but speak the things which we have seen and heard.
Acts 9:6
And he trembling and astonished said, Lord, what wilt Thou have me to do? And the Lord said unto him, Arise and go into the city, and it shall be told thee, what thou must do.
Acts 26:16
But rise, and stand on thy feet: for to this end have I appeared unto thee, to appoint thee a minister and a witness both of the things which thou hast seen, and of those for which I shall hereafter appear unto thee:
Romans 1:14
For I am a debtor both to Greeks and barbarians, both to the learned and the unlearned:

General references

Luke 17:10
I think not. So likewise ye, when ye have done all things that were commanded you, say we are unprofitable servants, for we have done only what we ought to do.