2 Corinthians 9:1-3

For it is superfluous for me to write to you about this ministry to the saints;

for I know your willingness, of which I boast about you to the Macedonians, namely, that Achaia has been prepared since last year, and your zeal has stirred up most of them.

But I have sent the brothers, in order that our boasting about you may not prove empty in this case, so that, as I was saying, you will be prepared;