Romans 3:21 specifies that the Law and Prophets witness to God's righteousness — the very promise mentioned here.

Romans 16:26 reiterates that the prophetic writings reveal the gospel to all nations — mirroring the promise here.

Luke 24:27 expands: Jesus interpreted all Scriptures concerning himself — exactly the promised content of the holy Scriptures here.

Acts 10:43 declares all prophets bear witness that believers receive forgiveness through Christ — directly echoing the promised testimony here.

Luke 1:69 is a specific fulfillment: God raised a horn of salvation from David, directly embodying the promised gospel.

John 5:39 confirms that the Scriptures bear witness to Christ — the very same gospel promised here.

2 Timothy 3:15 shows the Scriptures lead to salvation in Christ — the goal of the promised gospel here.

Titus 1:2 shows God's promise existed before time itself, not just through prophets — deepening the eternal scope of the gospel.