In 3 John 1:10, Diotrephes refuses to welcome believers — directly opposite to the call to hospitality in verse 8.

Verse 9 gives the negative example: Diotrephes refuses to welcome workers, directly opposing the command in verse 8 to support them.

In Matthew 10:40, Jesus identifies welcoming his messengers with welcoming himself — same principle behind the hospitality in 3 John 1:8.

In 1 Corinthians 3:5-9, Paul describes believers as fellow workers for God — directly parallel to working together for the truth.

In 1 Corinthians 16:10, Paul urges the church to welcome Timothy, a fellow worker — same principle of supporting those doing the Lord's work.

In 1 Corinthians 16:11, Paul instructs to speed Timothy on his way — directly parallels showing hospitality to missionaries.

In 2 Corinthians 8:23, Paul calls Titus his partner and fellow worker — same language of partnership in gospel work as in 3 John.

In Philippians 4:3, Paul refers to fellow workers who labored side by side in the gospel — directly parallel to working together for the truth.

In Colossians 4:11, Paul names fellow workers for the kingdom of God — same concept of partnership in God's work as in 3 John.

In Matthew 10:11, Jesus instructs disciples to find worthy people to stay with—directly parallels the hospitality for workers 3 John 1:8 commands.

In Acts 16:15, Lydia invites Paul and his companions to stay at her home—a concrete example of hospitality to workers as 3 John 1:8 urges.

1 Corinthians 3:9 uses the same 'fellow workers' (synergoi) term, emphasizing that all who serve God are co-laborers—here applied to supporters of truth.

In Acts 15:4, Paul and Barnabas are welcomed by the church in Jerusalem—illustrating the reception of traveling workers that 3 John 1:8 encourages.

Acts 21:17 shows the Jerusalem church warmly receiving Paul—modeling the hospitality urged in 3 John 1:8 for supporting traveling workers.

1 Corinthians 16:16 urges submission to fellow workers—complementary to 3 John 1:8's call to support them as partners in truth.

In Philemon 1:24, Paul names fellow workers like Mark and Luke—the same kind of coworkers for the truth that 3 John 1:8 urges supporting.