Acts 9:1–19 (ESV)

1 But Saul, still breathing threats and murder against the disciples of the Lord, went to the high priest

The concluding section of Psalm 22 looks forward to people from all nations worshipping the Lord. This would be a good song to sing in response to your sermon. 

o   Seedbed Psalter

o   Reformed Churches in New Zealand (lyrics and sheet music) (audio)