1 Thessalonians 1:5

1:5 in that our gospel did not come to you merely in words, but in power and in the Holy Spirit and with deep conviction (surely you recall the character we displayed when we came among you to help you).

1 Thessalonians 2:9

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.