2 Thessalonians 2:1-2

Now in regard to the coming of our Lord Jesus Christ and our gathering together to meet Him, we ask you, brothers and sisters, [Mark 13:27; 1 Thess 2:19; 4:15-17] not to be quickly unsettled or alarmed either by a [so-called prophetic revelation of a] spirit or a message or a letter [alleged to be] from us, to the effect that the day of the Lord has [already] come.