For your fellowship, &c.— Your participation in the gospel: so Doddridge, and also Heylin, who observes that the meaning is, "the part you have in the gospel;—obeying its precepts, and profiting by the graces which accompany it." See 1 Corinthians 1:9. 2 Corinthians 8:4; 2 Corinthians 13:13.
Related Commentaries of Philippians 1:5
Philippians 1:5
5 For your fellowship in the gospel from the first day until now;