2 Corinthians 8:6; 2 Corinthians 8:16-17

6 As a result, we challenged Titus to finish this work of grace with you the way he had started it.
16 But thank God, who put the same commitment that I have for you in Titus' heart. 17 Not only has he accepted our challenge but he's on his way to see you voluntarily, and he's excited.