I Thessalonians 3:1-5 NKJV
Therefore, when we could no longer endure it, we thought it good to be left in Athens alone, and sent Timothy, our brother and minister of God, and our fellow laborer in the gospel of Christ, to establish you and encourage you concerning your faith, that no one should be shaken by these afflictions; for you yourselves know that we are appointed to this. For, in fact, we told you before when we were with you that we would suffer tribulation, just as it happened, and you know. For this reason, when I could no longer endure it, I sent to know your faith, lest by some means the tempter had tempted you, and our labor might be in vain.
NKJV: New King James Version