Acts 16:21 is part of the same Philippi narrative, detailing the accusation against Paul shortly after his arrival.

Acts 20:6 records Paul leaving Philippi later, continuing the same travel account and confirming the Philippian stay.

Philippians 1:1 addresses the church at Philippi, the city where Paul first preached in Acts 16:12, linking the epistle to its founding.

1 Thessalonians 2:2 recalls Paul's suffering in Philippi, the very event described later in Acts 16, connecting the narrative.

1 Thessalonians 1:7 shows that the Macedonian churches, starting with Philippi, became examples to the entire region.