Galatians 6:4

let everyone bring his own work to the test ??then he will have something to boast about on his own account, and not in comparison with his fellows.

1 Corinthians 11:28

Let a man test himself; then he can eat from the loaf and drink from the cup.

2 Corinthians 13:5

Put yourselves to the proof, not me; test yourselves, to see if you are in the faith. Do you not understand that Christ Jesus is within you? Otherwise you must be failures.

Luke 18:11

The Pharisee stood up and prayed by himself as follows; 'I thank thee, O God, I am not like the rest of men, thieves, rogues, and immoral, or even like yon taxgatherer.

1 Corinthians 1:12-13

By 'quarrelling' I mean that each of you has his party-cry, "I belong to Paul," "And I to Apollos," "And I to Cephas," "And I to Christ."

1 Corinthians 3:21-23

So you must not boast about men. For all belongs to you;

1 Corinthians 4:3-4

It matters very little to me that you or any human court should cross-question me on this point. I do not even cross-question myself;

1 Corinthians 4:6-7

Now I have applied what has been said above to myself and Apollos, to teach you ... that you are not to be puffed up with rivalry over one teacher as against another.

2 Corinthians 1:12

My proud boast is the testimony of my conscience that holiness and godly sincerity, not worldly cunning but the grace of God, have marked my conduct in the outside world and in particular my relations with you.

2 Corinthians 11:12-13

No, I intend to go on as I am doing, in order to checkmate those who would fain make out that in the apostolate of which they boast they work on the same terms as I do.

Galatians 6:13

Why, even the circumcision party do not observe the Law themselves! They merely want you to get circumcised, so as to boast over your flesh!

1 John 3:19-22

Thus it is that we may be sure we belong to the truth and reassure ourselves

Treasury of Scripture Knowledge

Summary

But let every man prove his own work, and then shall he have rejoicing in himself alone, and not in another.

Bible References

Prove

1 Corinthians 11:28
Let a man test himself; then he can eat from the loaf and drink from the cup.
2 Corinthians 13:5
Put yourselves to the proof, not me; test yourselves, to see if you are in the faith. Do you not understand that Christ Jesus is within you? Otherwise you must be failures.

Rejoicing

1 Corinthians 4:3
It matters very little to me that you or any human court should cross-question me on this point. I do not even cross-question myself;
2 Corinthians 1:12
My proud boast is the testimony of my conscience that holiness and godly sincerity, not worldly cunning but the grace of God, have marked my conduct in the outside world and in particular my relations with you.
1 John 3:19
Thus it is that we may be sure we belong to the truth and reassure ourselves

And not

Galatians 6:13
Why, even the circumcision party do not observe the Law themselves! They merely want you to get circumcised, so as to boast over your flesh!
Luke 18:11
The Pharisee stood up and prayed by himself as follows; 'I thank thee, O God, I am not like the rest of men, thieves, rogues, and immoral, or even like yon taxgatherer.
1 Corinthians 1:12
By 'quarrelling' I mean that each of you has his party-cry, "I belong to Paul," "And I to Apollos," "And I to Cephas," "And I to Christ."
1 Corinthians 3:21
So you must not boast about men. For all belongs to you;
1 Corinthians 4:6
Now I have applied what has been said above to myself and Apollos, to teach you ... that you are not to be puffed up with rivalry over one teacher as against another.
2 Corinthians 11:12
No, I intend to go on as I am doing, in order to checkmate those who would fain make out that in the apostolate of which they boast they work on the same terms as I do.