2 Corinthians 8:7-8

RKJNT(i) 7 Therefore, as you excel in everything, in faith, and utterance, and knowledge, and in all earnestness, and in your love for us, see that you excel in this gracious work as well. 8 I do not speak this as a commandment, but to use the zeal of others to test the sincerity of your own love.