II Corinthians 8:6-8

So we urged Titus, that as he had begun, so he would also complete this grace in you as well. 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.