2 Corinthians 8:5-9

and this, not as we had expected, but they first gave themselves to the Lord and to us by the will of God.

So we urged Titus that as he had previously made a beginning, so he would also complete in you this gracious work as well.

But just as you excel in everything, in faith, speaking, knowledge, and in all earnestness and in the love we inspired in you, see that you also excel in this gracious work.

I am not saying this as a command, but as proving, through the earnestness of others, the sincerity of your love as well.

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 through His poverty might become rich.