حَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ حَدَّثَنَا بَهْزٌ حَدَّثَنَا وُهَيْبٌ حَدَّثَنَا خَالِدٌ الْحَذَّائُ بِهَذَا الْإِسْنَادِ لَمَّا کَثُرَ النَّاسُ ذَکَرُوا أَنْ يُعْلِمُوا بِمِثْلِ حَدِيثِ الثَّقَفِيِّ غَيْرَ أَنَّهُ قَالَ أَنْ يُورُوا نَارًا
صحیح مسلم · Hadith 840
Anas b. Malik reported: They (the Companions) discussed that they should know the timings of prayer by means of something recognized by all. Some of them said that fire should be lighted or a bell should be rung. But Bilal was ordered to repeat the phrases twice in Adhan, and once in Iqama.
Sanad
حَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ حَدَّثَنَا بَهْزٌ حَدَّثَنَا وُهَيْبٌ حَدَّثَنَا خَالِدٌ الْحَذَّائُ