Philippians 4:3 (CSB) Yes, I also ask you, true partner, to help these women who have contended for the gospel at my side, along with Clement and the rest of my coworkers whose names are in the book of life.

Who was Paul's coworkers? Peter, Apollos, Barnabas, Aquila, Priscilla, Euodia, Syntyche, Clement, for a few examples. But really to Paul every one who's name was written in the Book of Life. Who has their name written in the Book of Life? Those who have come to trust Jesus! Those who are called Christian, son or daughter, friend. Paul is asking the true partner in Philippi to help all Christians!

Galatians 6:10 (NASB)
So then, while we have opportunity, let us do good to all people, and especially to those who are of the household of the faith.

When we do good to all people especially fellow Christians we are helping them. Some times it is with money. Some times it is serving. Some times it is prayer. Some times it is just company. But all the time it is good.