1 Thessalonians 2:10-11

2:10 You are witnesses, and so is God, as to how holy and righteous and blameless our conduct was toward you who believe. 2:11 As you know, we treated each one of you as a father treats his own children,

1 Thessalonians 3:1

3:1 So when we could bear it no longer, we decided to stay on in Athens alone.