And We have sundered them in the earth as (separate) nations. Some of them are righteous, and some far from that. And We have tried them with good things and evil things that haply they might return.
Times are computed by method; your mosque's timetable governs the adhan. Every text carries its source and grade. Nothing here is a fatwa, a prediction, or a substitute for a doctor: your own scholar decides what is contested, and the tradition itself says the practice is alongside treatment, never instead of it.