Sunna 25

Sunna of answering the call for prayers (adhan):

Repeat the wordings of the caller (moadhin), except when he says,

حى على الصلوة and حى على الفلاح

answer them by saying,

لا حول ولا قوة الا بالله

In predawn (fajr) adhan when the caller says

الصلوة خير من النوم

answer by saying,

صدقت و بررت