until he dismounted. So I began doing the same, because when prayers are combined, the time of the second prayer becomes the time for both, and the adhān announces the time for prayer. This is why we hold that the adhān should be given for a missed prayer, just as Bilāl gave it when they slept through Fajr: that is the time for it, and the adhān announces the time when the prayer is performed, not the time when it becomes obligatory.

He was asked:

If someone has begun a voluntary prayer with the opening takbīr and then hears the caller to prayer, should he interrupt his prayer and repeat what the caller says? Or should he complete his prayer and repeat what the caller says?

He replied:

If someone hears the adhān while praying, he should complete his prayer without repeating what the caller says, according to the majority of scholars. However, if he is outside prayer, engaged in recitation, remembrance of Allah, or supplication, he should pause that and repeat what the caller says. This is because responding to the caller is an act of worship whose appointed time will pass, whereas these other forms of remembrance can be resumed later. Interrupting their continuity for a religiously sanctioned reason is permissible, just as one may interrupt