Albert Barnes Commentary Philemon 1:5

"hearing of thy love, and of the faith which thou hast toward the Lord Jesus, and toward all the saints;" — Philemon 1:5 (ASV)

Hearing of thy love and faith. Paul may have heard this either from Onesimus, who, after his conversion, would be disposed to state all that he knew that was favourable of Philemon, or he may have heard it from other persons who had come from Colosse to Rome.

The faith mentioned here refers to the Lord Jesus; the love refers to the saints.

The word order in the Greek is indeed the same as in our version. However, it is not unusual, by synthesis (that is, uniting two or more things together), to arrange words in that manner. Thus, Matthew 12:22 states: The blind and dumb both spake and saw; that is, the blind saw, and the dumb spoke.

The meaning is that Philemon had strong faith in the Lord Jesus and ardent love towards all who were Christians. See a similar declaration in Colossians 1:4.