Acts 16: 25 relates: “About the middle of the night Paul and Silas were praying and praising God with song; yes, the prisoners were hearing them. ” Note this detail: They did not just pray, they sang.
من اللافت انهما لم يصلّيا فحسب ،‏ بل ايضا رنَّما ،‏ وكان صوتهما مسموعا لدى السجناء الآخرين .‏