'Proof' in the Bible

hypocrites! the face of the earth and of the heaven ye have known to make proof of, but this time -- how do ye not make proof of it?

for, for this also did I write, that I might know the proof of you, whether in regard to all things ye are obedient.

through the proof of this ministration glorifying God for the subjection of your confession to the good news of the Christ, and for the liberality of the fellowship to them and to all,

since a proof ye seek of the Christ speaking in me, who to you is not infirm, but is powerful in you,

and the proof of him ye know, that as a child serveth a father, with me he did serve in regard to the good news;

knowing that the proof of your faith doth work endurance,

that the proof of your faith -- much more precious than of gold that is perishing, and through fire being approved -- may be found to praise, and honour, and glory, in the revelation of Jesus Christ,