‘Abdallah b. Zaid b. “Abd Rabbihi said

When Allah's Messenger 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 Allah, will you sell the bell ?” When he asked what I would do with it and I replied that we would use it to call people to prayer, he said, “Shall I not guide you to something better than that?" I replied, “Certainly”; so he told me to say, “Allah is most great ...” and similarly in the iqama. When I told Allah's Messenger ﷺ in the morning what I had seen he said, “It is a genuine vision, if Allah will; so get up along with Bilal, and when you have taught him what you have seen let him use it in making the call to prayer, for he has a stronger 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 b, al-Khattab heard that when he was in his house, and he came out trailing his cloak and said, “ Messenger of Allah , by Him who has sent you with the truth, I have seen the same kind of thing as has been revealed," to which Allah's Messenger ﷺ replied, “To Allah be the praise!” Abu Dawud, Darimi and Ibn Majah transmitted it, but Ibn Majah did not mention the iqama. Tirmidhi said that this is a sahih, tradition, but that it did not make the story of the bell explicit.