Reference: Sharh 'Umdatil-Fiqh - Tape no.8 q20
Question: When the mu.adhdhin says:
« الصلاة خير من النوم »
...should the one who hears [the adhaan] say:
« لا حول و لا قوة إلاّ بالله »
...or what should he respond with?
Response: The correct [opinion] is that he should say:
« الصلاة خير من النوم »
...just as the mu.adhdhin says; this is based upon the generality of his ﷺ saying:
«When you hear the mu.adhdhin, say what he says» [transmitted by al-Bukhaaree no.611 and Muslim no.383]
...and the only exception is when he says:
« حي على الصلاة »
...and:
« حي على الفلاح »
As for the rest [of the adhaan], then he should say what the mu.adhdhin says.
