2 Corinthians 1:11

1:11 as you also join in helping us by prayer, so that many people may give thanks to God on our behalf for the gracious gift given to us through the help of many.

2 Corinthians 8:22

8:22 And we are sending with them our brother whom we have tested many times and found eager in many matters, but who now is much more eager than ever because of the great confidence he has in you.