Philemon 1:6
That the communication of thy faith may become effectual by the acknowledging of every good thing which is in you in Christ Jesus.
Cross-references
1 Peter 2:12 urges honorable conduct so that others see good deeds and glorify God — this is the outward fruit of effective faith.
2 Peter 1:8 directly warns against being ineffective or unfruitful in the knowledge of Christ — mirroring Paul's prayer for effective faith leading to full knowledge.
1 Peter 3:1 shows wives winning husbands without words by their conduct — a specific example of faith becoming effective through actions.
Philippians 1:9-11 prays for abounding love and discernment producing fruit — parallels Paul's prayer for effective faith in Philemon.
Philippians 4:8 lists what is true, honorable, pure — this verse fills out the 'every good thing' Paul prays for Philemon to know.
In Hebrews 13:16, sharing and doing good are pleasing sacrifices — a concrete outworking of the faith-sharing that Philemon asks to become effective.
1 Peter 3:16 ties good behavior to a clear conscience and silencing slander — this reflects the 'every good thing' that faith in action produces.