Revelation 2:2-4

2I know your deeds, your hard work and your perseverance. I know that you cannot tolerate wicked people, that you have tested those who claim to be apostles but are not, and have found them false.

3You have persevered and have endured hardships for my name, and have not grown weary. 4Yet I hold this against you: You have forsaken the love you had at first.