A.T. Robertson Commentary Philemon 1:8

"Wherefore, though I have all boldness in Christ to enjoin thee that which is befitting," — Philemon 1:8 (ASV)

Though I have (εχων). Concessive participle (present active).

That which is befitting (το ανηκον). Neuter singular accusative of the articular participle (present active) of ανηκω, to come up to requirements and so to be befitting. For idea in ανηκω, see Col 3:18; Ephesians 5:4. This idiom is in later writers.

I rather beseech (μαλλον παρακαλω). Rather than command (επιτασσω) which he has a perfect right to do.