2 Corinthians 9:3-4

9:3 But I am sending these brothers so that our boasting about you may not be empty in this case, so that you may be ready just as I kept telling them. 9:4 For if any of the Macedonians should come with me and find that you are not ready to give, we would be humiliated (not to mention you) by this confidence we had in you.