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.

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]‏ .‏