عَنْ أَبِي مَحْذُورَةَ - رضى الله عنه - { أَنَّ اَلنَّبِيَّ - صلى الله عليه وسلم -عَلَّمَهُ اَلْآذَانَ, فَذَكَرَ فِيهِ اَلتَّرْجِيعَ } أَخْرَجَهُ مُسْلِمٌ. وَلَكِنْ ذَكَرَ اَلتَّكْبِيرَ فِي أَوَّلِهِ مَرَّتَيْنِ فَقَطْ 1 .1 - صحيح. رواه مسلم (379). "والترجيع": أي في الشهادتين فيقولها مرة بصوت منخفض، ومرة أخرى بصوت مرتفع.
Narrated Narrated Abu Mahdhura (RA):
The Prophet (ﷺ) taught him the Adhan (call to prayer) and he (the narrator) mentioned the Tarji' in it.
[Muslim reported it, but mentioned the phrase (Takbir) "Allah is the Most Great" at its beginning just twice.
Bilal was commanded to announce the Adhan (each phrase) twice and the Iqamah (each phrase) once except "The prayer stood ready to begin" (to be pronounced twice).
"It is from the Sunnah that when the Mu'adhadhin says Fajr (prayer time): 'Haiya 'alal-Falah (Come to the success)', he says (also) 'as-Salatu khairun minan-nawm (Prayer is better than sleep).'"