In Galatians 5:11, Paul links his ongoing persecution to preaching the cross — the same conflict between flesh and Spirit described in 4:29.

Galatians 6:12-14 reveals that those promoting circumcision do so to avoid persecution for the cross — exactly the fleshly persecution pattern of 4:29.

Genesis 21:9 describes Ishmael mocking Isaac, which Paul interprets as persecution by the flesh-born against the Spirit-born.

1 Thessalonians 2:15 explicitly names the Jews who killed Jesus and prophets — exemplifying the fleshly persecution of the spiritual that Paul describes in 4:29.

In John 8:37, Jesus tells the Jews they seek to kill him — a direct parallel to the flesh persecuting the Spirit, as in Galatians 4:29.

In Matthew 23:34-37, Jesus laments Jerusalem killing the prophets — a pattern of the religious establishment persecuting God's messengers, like flesh persecuting Spirit.

1 Thessalonians 2:14 notes believers suffering from their own countrymen, mirroring the persecution of the spiritual by the fleshly in Galatians 4:29.