1 Thessalonians 2:1; 1 Thessalonians 2:13

1 For you yourselves know, brothers, that our coming to you was not in vain.

13 And we also thank God constantly for this, that when you received the word of God, which you heard from us, you accepted it not as the word of men but as what it really is, the word of God, which is at work in you believers.