2 Corinthians 1:12

For my boast is this, to which my conscience testifies, that before the world, but especially before you, I have acted from pure motives and in sincerity before God, not depending on worldly wisdom but on God's unmerited favor.

1 Thessalonians 2:10

You can testify, and God too, with what pure, upright, and irreproachable motives I dealt with you who believed;

1 Timothy 1:13

though I once used to abuse, persecute, and insult Him. But mercy was shown me by Him, because I did it in ignorance and unbelief,

Treasury of Scripture Knowledge

Summary

Said he not unto me, She is my sister? and she, even she herself said, He is my brother: in the integrity of my heart and innocency of my hands have I done this.

Bible References

In the integrity

2 Corinthians 1:12
For my boast is this, to which my conscience testifies, that before the world, but especially before you, I have acted from pure motives and in sincerity before God, not depending on worldly wisdom but on God's unmerited favor.
1 Thessalonians 2:10
You can testify, and God too, with what pure, upright, and irreproachable motives I dealt with you who believed;
1 Timothy 1:13
though I once used to abuse, persecute, and insult Him. But mercy was shown me by Him, because I did it in ignorance and unbelief,