Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
abudawud:446Muʾammal b. al-Faḍl > al-Walīd > Ḥarīz / Ibn ʿUthmān > Yazīd b. Ṣāliḥ

"He (Bilal) called for prayer unhurriedly."  

أبو داود:٤٤٦حَدَّثَنَا 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