Acts 13:50 records persecution that drove Paul and Barnabas out — a concrete instance of the life-threatening risk mentioned in Acts 15:26.

Acts 14:19 describes Paul being stoned and left for dead — another example of the danger they risked their necks for, as in Acts 15:26.

Acts 16:19 describes Paul and Silas being seized—an example of the dangers they faced, consistent with risking their lives.

In 1 Corinthians 15:30, Paul asks why he faces danger every hour—consistent with risking his life as stated here.

2 Corinthians 11:23-27 catalogues Paul's sufferings—directly illustrating what it meant to risk his life as mentioned here.

Philippians 2:30 describes Epaphroditus risking his life for Christ—another example of the same sacrificial commitment.