"Abu Qilabah said to me (Ayyub): He ('Amr) is still alive, do you want to meet him?" I met him and asked him, and he said: "When Makkah was conquered, all the people hastened to announce their Islam. My father went to announce the Islam of the poeple of our village, and when he came back we went to see him and he said: 'By Allah, I have indeed come to you from the Messenger of Allah (S.A.W)'. He said: 'Pray such and such a prayer at such and such a time, pray such and such a prayer at such and such a time. When the time for prayer comes let one of you call the Adhan and let the one who knows the most Qur'an lead the prayer.'"
"The Messenger of Allah (S.A.W) said: 'Bilal calls the Adhan during the night, so eat and drink until Ibn Umm Maktum calls the Adhan." She said: "And there was no more between than the time it takes for one to come down and the other to go up."
"Bilal calls the Adhan during the night to wake those who are sleeping and so that those who are praying Qiyam can return.[1] Not to say it is like this." The break of dawn is not like this. [2] [1] Meaning to finish. Ash-Shawkani said: "To return to sleeping or return to sitting from praying" Nail Al-Awtar. [2] Indicating with an up and down motion. The true dawn is from right to left.
"I see that you love sheep and the desert. When you are with your sheep or in the desert and you call the Adhan for prayer, then raise your voice, for no human, Jinn or anything else hears the voice of the Mu'adhdhin as far as it reaches, but it will bear witness for him on the Day of Resurrection." Abu Sa'eed said: "I heard it from the Messenger of Allah (S.A.W)."