The Apostle Paul
2 Corinthians 9:3ESV·traditional attribution

But I am sending the brothers so that our boasting about you may not prove empty in this matter, so that you may be ready, as I said you would be.

John Calvin Reformed @genevareformer

3. But I have sent the brethren. He now brings forward the reason — why it is that, while entertaining a favorable opinion as to their willingness, he, nevertheless, sets himself carefully to exhort them. “I consult,” says he, “my own good name and yours; for while I promised in your name, we would, both of us in common, incur disgrace, if words and deeds did not correspond.

Matthew Henry Presbyterian @wholebiblehenry

In these verses the apostle speaks very respectfully to the Corinthians, and with great skill; and, while he seems to excuse his urging them so earnestly to charity, still presses them thereto, and shows how much his heart was set upon this matter. I.

Commenting on 2 Corinthians 9:1-5

John Gill Reformed Baptist @doctorgill

Yet have I sent the brethren,.... Titus, and the other two mentioned in the foregoing chapter: one manuscript reads, "we have sent"; and the Ethiopic version, "they have sent", that is, the Macedonians; but the common reading is best. It might be objected, that since the apostle knew the forwardness of their minds, how ready they were a year ago, and had boasted so much...