I testify that there is no god but Allah, I testify that there is no god but Allah; I testify that Muhammad is the Messenger of Allah, I testify that Muhammad is the Messenger of Allah. Lowering your voice while saying them (these words). Then you must raise your voice in making the testimony: I testify that there is no god but Allah, I testify there is no god but Allah; I testify Muhammad is the Messenger of Allah, I testify Muhammad is the Messenger of Allah. Come to prayer, come to prayer; come to salvation, come to salvation. If it is the morning prayer, you must pronounce; prayer is better than sleep, prayer is better than sleep, Allah is most great; there is no god but Allah. (Using translation from Abū Dāʾūd 500)   

أَنَّ رَسُولَ اللَّهِ ﷺ أَمَرَ نَحْوًا مِنْ عِشْرِينَ رَجُلًا فَأَذَّنُوا فَأَعْجَبَهُ صَوْتُ أَبِي مَحْذُورَةَ فَعَلَّمَهُ الْأَذَانَ اللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ أَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللَّهِ أَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللَّهِ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ أَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللَّهِ أَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللَّهِ حَيَّ عَلَى الصَّلَاةِ حَيَّ عَلَى الصَّلَاةِ حَيَّ عَلَى الْفَلَاحِ حَيَّ عَلَى الْفَلَاحِ اللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ لَا إِلَهَ إِلَّا اللَّهُ وَالْإِقَامَةَ مَثْنَى مَثْنَى  

the Prophet taught him the Adhan with nineteen phrases, and the Iqamah with seventeen phrases. (Using translation from Tirmidhī 192)   

أَنَّ رَسُولَ اللَّهِ ﷺ «عَلَّمَهُ الْأَذَانَ تِسْعَ عَشْرَةَ كَلِمَةً وَالْإِقَامَةَ سَبْعَ عَشْرَةَ كَلِمَةً»