For your fellowship (ἐπὶ τῇ κοινωνίᾳ ὑμῶν)
Connect with I thank God. For fellowship, see on 1Jo 1:3. The word sometimes has the meaning of almsgiving, contributions, as Rom 15:26; Heb 13:16. Though here it is used in the larger sense of sympathetic cooperation, yet it is no doubt colored by the other idea, in view of the Philippians' pecuniary contributions to Paul. See Phi 4:10, Phi 4:15, Phi 4:16.