Acts 18:2 introduces Aquila and Priscilla, whom Paul now leaves Corinth with — a direct narrative link.

Acts 21:23 shows Paul joining four men under a vow and paying for their shaving — a later parallel to his own vow here.

Acts 21:24 involves head shaving for a vow — similar to Paul's haircut here due to a vow.

Acts 15:41 describes Paul strengthening churches in Syria — the same region he sails to here.

Acts 21:3 also records Paul sailing to Syria — a parallel travel route in his journeys.

Numbers 6:5-9 outlines the Nazirite vow's hair regulations — the likely OT background for Paul's haircut here.

Numbers 6:18 describes the Nazirite shaving his head at the tent of meeting — the exact ritual Paul likely performed here.

Galatians 1:21 corroborates Paul's travel to Syria and Cilicia — matching his destination here.

In 2 Timothy 4:19, Paul sends greetings to Priscilla and Aquila — the same couple traveling with him here.

In 1 Corinthians 9:20, Paul explains he becomes like a Jew to win Jews — this vow may be an instance of that principle.