II Corinthians 8:7-9

But as you abound in everything—in faith, in speech, in knowledge, in all diligence, and in your love for us—see that you abound in this grace also. I speak not by commandment, but I am testing the sincerity of your love by the diligence of others. For you know the grace of our Lord Jesus Christ, that though He was rich, yet for your sakes He became poor, that you through His poverty might become rich.