Narrated Abdullah ibn Zayd: The Prophet ﷺ intended to do many things for calling (the people) to prayer, but he did not do any of them. Then Abdullah ibn Zayd was taught in a dream how to pronounce the call to prayer. He came to the Prophet ﷺ and informed him. He said: Teach it to Bilal. He then taught him, and Bilal made a call to prayer. Abdullah said: I saw it in a dream and I wished to pronounce it, but he (the Prophet) said: You should pronounce iqamah.

Narrated Abu Umayr ibn Anas: Abu Umayr reported on the authority of his uncle who was from the Ansar (the helpers of the Prophet): The Prophet ﷺ was anxious as to how to gather the people for prayer. The people told him: Hoist a flag at the time of prayer; when they see it, they will inform one another. But he (the Prophet) did not like it. Then someone mentioned to him the horn. Ziyad said: A horn of the Jews. He (the Prophet) did not like it. He said: This is the matter of the Jews. Then they mentioned to him the bell of the Christians. He said: This is the matter of the Christians. Abdullah ibn Zayd returned anxiously from there because of the anxiety of the Messenger ﷺ. He was then taught the call to prayer in his dream. Next day he came to the Messenger of Allah ﷺ and informed him about it. He said: Messenger of Allah, I was between sleep and wakefulness; all of a sudden a newcomer came (to me) and taught me the call to prayer. Umar ibn al-Khattab had also seen it in his dream before, but he kept it hidden for twenty days. The Prophet ﷺ said to me (Umar): What did prevent you from saying it to me? He said: Abdullah ibn Zayd had already told you about it before me: hence I was ashamed. Then the Messenger of Allah ﷺ said: Bilal, stand up, see what Abdullah ibn Zayd tells you (to do), then do it. Bilal then called them to prayer. Abu Bishr reported on the authority of Abu Umayr: The Ansar thought that if Abdullah ibn Zayd had not been ill on that day, the Messenger of Allah ﷺ would have made him muadhdhin.

Abdullah bin Zaid reported: when the Messenger of Allah ﷺ ordered a bell to be made so that it might be struck to gather the people for prayer, a man carrying a bell in his hand appeared to me while I was asleep, and I said; servant of Abdullah, will you sell the bell? He asked; what will you do with it? I replied; we shall use it to call the people to prayer. He said; should I not suggest you something better than that. I replied: certainly. Then he told me to say: Allah is most great, Allah is most great, Allah is most great, Allah is most great. I testify that there is no god but Allah, I testify that Muhammad is the Messenger of Allah. Come to pray, come to pray; come to salvation; come to salvation. Allah is most great, Allah is most great. I testify that there is no god but Allah. He then moved backward a few steps and said: when you utter the IQAMAH, you should say: Allah is most great, Allah is most great. I testify that there is no god but Allah, I testify that Muhammad is the Messenger of Allah. Come to prayer, come to salvation. The time for prayer has come, the time for prayer has come: Allah is most great, Allah is most great. There is no god but Allah. When the morning came, I came to the Messenger of Allah ﷺ and informed him of what I had seen in the dream. He said: it is a genuine vision, and he then should use it to call people to prayer, for he has a louder voice than you have. So I got up along with Bilal and began to teach it to him and he used it in making the call to prayer. Umar bin al-khattab (Allah be pleased with him) heard it while he was in his house and came out trailing his cloak and said: Messenger of Allah. By him who has sent you with the truth, I have also seen the kind of thing as has been shown to him. The Messenger of Allah ﷺ said: To Allah be the praise. Abu Dawud said; Al-Zuhri narrated this tradition in a similar way from Saeed bin al-Musayyib on the authority of Abdullah bin Zaid. In this version Ibn Ishaq narrated from al-Zuhri: Allah is most great. Allah is most great, Allah is most great, Allah is most great. Ma;mar and yunus narrated from al-Zuhri; Allah is most great, Allah is most great. They did not report it twice again.