Acts 22:3 confirms Paul's Pharisaic education and zeal for God, paralleling his claim of advancing in Judaism.

Acts 26:5 adds that Paul lived as a Pharisee, the strictest sect, reinforcing his background of zeal for traditions.

Acts 26:9 shows Paul's zeal led him to oppose Christians, directly connecting his traditions-based zeal to persecution.

Philippians 3:4-6 lists Paul's Jewish credentials and zeal as a persecutor, mirroring his description of advancing in Judaism.

Luke 18:12 records a Pharisee boasting of fasting and tithing — practices Paul would have been zealous for.

John 16:2 predicts persecutors who think they serve God — Paul's own pre-conversion mindset as a zealot.

Romans 10:2 says Israel has zeal without knowledge — the same condition Paul describes here in his former life.

Philippians 3:6 directly parallels Paul's zeal and persecution of the church — the same earlier life he describes here.

Colossians 2:8 warns against human tradition — a contrast to Paul's former zeal for traditions here.