 is written just a very short time after 1 Thessalonians. Probably somewhere between three and six months after he had sent the first letter, he sends this one. So we know what happened was, we don't have the details of it or who told him, none of that's in Scripture, but clearly he got a report back of what was taking place in the church. And that's what leads to this letter. We don't know exactly what it said, but we know by these three chapters what problems were occurring that Paul had to address.