2 Corinthians 8:7-9

But as you excel in everything—in faith, in speech, in knowledge, in all earnestness, and in our love for you—see that you excel in this act of grace also. I say this not as a command, but to prove by the earnestness of others that your love also is genuine. For you know the grace of our Lord Jesus Christ, that though he was rich, yet for your sake he became poor, so that you by his poverty might become rich.