English translation
604. Narrated Ibn ‘Umar رضى الله عنهم: When the Muslims arrived at Al-Madīna, they used to assemble for Aṣ-Ṣalāt (the prayer), and used to guess the time for it. During those days, the practice of Adhān for Salāt (prayers) had not been introduced yet. Once they discussed this problem regarding the call for Salāt. Some people suggested the use of a bell like the Christians, others (1) (Book. 10) Adhān: The call to prayer pronounced loudly to indicate that the time of praying is due. And it is as follows: Allāhu Akbar, Allāhu Akbar, Allāhu Akbar, Allāhu Akbar, Aṣh-hadu an lā ilāha illallāh, Aṣh-hadu an lā ilāha illallāh, Aṣh-hadu anna Muḥammadan Rasūl-Ullāh, Aṣh-hadu anna Muḥammadan Rasūl-Ullāh, Haiya ‘alas-Ṣalāh, Haiya ‘alas-Ṣalāh, Haiya ‘alal-Falāh, Haiya ‘alal-Falāh, Allāhu Akbar, Allāhu Akbar, Lā ilāha illallāh. proposed a trumpet like the horn used by the Jews, but 'Umar was the first to suggest that a man should call (the people) for Aṣ-Ṣalāt; so, Allāh's Messenger ﷺ ordered Bilāl to get up and pronounce the Adhān for Aṣ-Ṣalāt.
