Abu Mahdhura said that the Messenger of Allah (ﷺ) taught him Adhan like this:
Allah is the Greatest, Allah is the Greatest; 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, and it should be again repeated: 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. Come to the prayer (twice). Come to success (twice). Ishaq added: Allah is the Greatest, Allah is the Greatest; there Is no god but Allah.
[sahih muslim 374 Book 4 hadith 6]
And Bilal Ra, is the first muadzin.
jzk, sister!
That´s true sister:) waantum fajazakumuLlahu khayran!