'In the Faith' in the Bible

Paul, a prisoner of Jesus Christ, and Timothy our brother, to Philemon, our dear helper in the faith,

in such sort that thy participation in the faith should become operative in the acknowledgment of every good thing which is in us towards Christ Jesus.

I appeal to you for my [own spiritual] child Onesimus, whom I have fathered [in the faith] while a captive in these chains.

If then you consider me to be a partner [in the faith], welcome him [back] as [you would] me.