1 Thessalonians 3:4
For verily, when we were with you, we told you before that we should suffer tribulation; even as it came to pass, and ye know. For verily, when we were with you, we told you before that we should suffer tribulation; even as it came to pass, and ye know.
While Paul was still with the Thessalonians he told them beforehand that suffering and tribulation would come upon them. What he had foretold came to pass just as he had said. The believers there then met trial and adversity, yet they remained true to God under it.