2 Corinthians 13:3
Since ye seek a proof of Christ speaking in me, which to you-ward is not weak, but is mighty in you.
2 Corinthians 2:9
For to this end also did I write, that I might know the proof of you, whether ye be obedient in all things.
2 Corinthians 8:24
Wherefore shew ye to them, and before the churches, the proof of your love, and of our boasting on your behalf.
Philippians 2:22
But ye know the proof of him, that, as a son with the father, he hath served with me in the gospel.
2 Timothy 4:5
But watch thou in all things, endure afflictions, do the work of an evangelist, make full proof of thy ministry.