Acts 9:1 provides the direct evidence of Saul's threats that Ananias heard, confirming the basis for his fear.

Acts 9:17 shows Ananias's obedience — he goes to Saul and calls him 'brother', directly contrasting his earlier fear in 9:13.

Acts 9:21 confirms the reputation Ananias reported — the hearers recall Saul's persecution, echoing his past evil.

Acts 8:3 shows Saul's earlier violent persecution of the church, which is the reputation Ananias is responding to.

Acts 22:4 is Paul's own testimony of persecuting believers—corroborating the reports that caused Ananias's fear.

Acts 22:19 recounts Paul's former persecution and his awareness that believers knew of it—reinforcing Ananias's concern.

In Acts 26:10, Paul confirms he locked up and killed saints — exactly the harm Ananias heard about.

In Acts 26:11, Paul adds he persecuted saints in synagogues — matching Ananias' report of his reputation.

In 1 Samuel 16:2, Samuel fears King Saul when sent to anoint David — parallel to Ananias fearing the persecutor Saul.

In 1 Timothy 1:13-15, Paul confesses he was a persecutor of saints — the very thing Ananias heard, now met with mercy.

Galatians 1:13 is Paul's own testimony of violently persecuting the church, corroborating Ananias's hearsay.

Galatians 1:23 reports that the former persecutor now preaches — contrasting the evil Ananias had heard about.

In 1 Kings 18:9-14, Obadiah fears Ahab and Jezebel, hiding prophets — similar fear of persecution as Ananias faces.

Jeremiah 20:10 shows the same experience of hearing widespread reports of plots—reinforcing the fear Ananias feels from Saul's reputation.