2 Corinthians 7:10 explains the godly sorrow that produced the fear and trembling mentioned here — direct contextual link.

2 Corinthians 7:11 lists 'fear' as a result of their godly sorrow — the same fear that caused them to receive Titus with trembling.

2 Corinthians 7:13 reports Titus's spirit refreshed by you — verse 15 explains his greater affection came from your fear and trembling.

In 2 Corinthians 2:9, Paul also links obedience to testing — the same obedience Titus saw in them.

In 2 Corinthians 6:12, Paul says the Corinthians' affections are restricted—opposite to Titus's growing affection for them here.

Psalm 2:11 uses the exact phrase 'fear and trembling' to describe serving God — the same reverent attitude shown here.

In Philippians 1:8, Paul yearns for the Philippians with Christ's affection—same deep pastoral love as Titus's for the Corinthians.

Philippians 2:12 uses the exact phrase 'fear and trembling' for obedience to Paul — paralleling their reception of Titus.

1 John 3:17 warns against closing one's heart to a brother—opposite to Titus's open affection for the Corinthians.

Ephesians 6:5 uses 'fear and trembling' for slaves obeying masters — same phrase applied to a different relationship.

Colossians 3:12 commands compassionate hearts—the virtue Titus demonstrated toward the Corinthians.