You can enable debug mode via CBA option menu, requires mission restart.

CBA Event:
fox_mosque_prayer_event_pray
Example:

["fox_mosque_prayer_event_pray", {hint str _this;}] call CBA_fnc_addEventHandler;

Passed event args:
0: false | "zeus" | "loop" >> indicates how the sound was played, via zeus or default loop.
1: string >> sound name