2 Corinthians 2:9-13

For this was my purpose in writing, to see if you would stand the test, whether you are obedient and committed to following my instruction in all things. If you forgive anyone anything, I too forgive [that one]; and what I have forgiven, if I have forgiven anything, has been for your sake in the presence of [and with the approval of] Christ, to keep Satan from taking advantage of us; for we are not ignorant of his schemes. Now when I arrived at Troas to preach the good news of Christ, even though a door [of opportunity] opened for me in the Lord, my spirit could not rest because I did not find my brother Titus there; so saying goodbye to them, I left for Macedonia.