حَدَّثَنَا مُؤَمَّلُ بْنُ الْفَضْلِ، حَدَّثَنَا الْوَلِيدُ، عَنْ حَرِيزٍ، - يَعْنِي ابْنَ عُثْمَانَ - عَنْ يَزِيدَ بْنِ صَالِحٍ، عَنْ ذِي، مِخْبَرِ بْنِ أَخِي النَّجَاشِيِّ فِي هَذَا الْخَبَرِ قَالَ فَأَذَّنَ وَهُوَ غَيْرُ عَجِلٍ ‏.‏

This tradition has also been transmitted through another chain of narrators by Dhu Mikhbar, the nephew of the Negus. This version adds: "He (Bilal) called for prayer unhurriedly." Translation Not Available

Book reference: Sunan Abi Dawud Book 2 Hadith 446
Web reference: Sunan Abi Dawud Book 2 Hadith 446