Philippians 2:22 in the World English Bible
But you know that he has proved himself. As a child serves a father, so he served with me in furtherance of the Good News.
Context
21 For all seek their own, not the things which are Jesus Christ’s.
22 But ye know the proof of him, that, as a son with the father, he hath served with me in the gospel.
23 Him therefore I hope to send presently, so soon as I shall see how it will go with me.