Philemon 1:13

ὃν ἐγὼ ἐβουλόμην πρὸς ἐμαυτὸν κατέχειν, ἵνα ὑπὲρ σοῦ διακονῇ μοι ἐν τοῖς δεσμοῖς τοῦ εὐαγγελίου·

on egō eboylomēn pros emayton katechein, ina yper soy diakonē moi en tois desmois toy eyaggelioy·

King James Version (KJV)

Whom I would have retained with me, that in thy stead he might have ministered unto me in the bonds of the gospel:

Modern English

I would have liked to keep him with me so that he could take your place in helping me while I am in chains for the gospel.