1 Thessalonians 2:8-9

2:8 with such affection for you we were happy to share with you not only the gospel of God but also our own lives, because you had become dear to us. 2:9 For you recall, brothers and sisters, our toil and drudgery: By working night and day so as not to impose a burden on any of you, we preached to you the gospel of God.

1 Thessalonians 3:13

3:13 so that your hearts are strengthened in holiness to be blameless before our God and Father at the coming of our Lord Jesus with all his saints.