[Machine] When prayer time arrived during the era of the Prophet Muhammad ﷺ, a man hurried on the road and called out, "Prayer, prayer!" This caused a commotion among the people, so they said, "If only we had a bell, O Messenger of Allah!" He replied, "That is for Christians." They then said, "If only we had a horn." He replied, "That is for Jews." So Bilal was commanded to give the call to prayer and give the call for the start of prayer.  

كَانَتِ الصَّلَاةُ إِذَا حَضَرَتْ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ سَعَى رَجُلٌ فِي الطَّرِيقِ فَنَادَى الصَّلَاةَ الصَّلَاةَ فَاشْتَدَّ ذَلِكَ عَلَى النَّاسِ فَقَالُوا لَوِ اتَّخَذْنَا نَاقُوسًا يَا رَسُولَ اللهِ فَقَالَ ذَلِكَ لِلنَّصَارَى فَقَالُوا لَوِ اتَّخَذْنَا بُوقًا قَالَ ذَلِكَ لِلْيَهُودِ قَالَ فَأُمِرَ بِلَالٌ أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ