Those are they for whom is naught in the Hereafter save the Fire. (All) that they contrive here is vain and (all) that they are wont to do is fruitless.
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.