Sunan Abi Dawud, Hadith 2839 ⓘ
Narrated Abdullah ibn Mughaffal: The Prophet said: Were dogs not a species of creature I should command that they all be killed; but kill every pure black one.
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَزِيدُ، حَدَّثَنَا يُونُسُ، عَنِ الْحَسَنِ، عَنْ عَبْدِ اللَّهِ بْنِ مُغَفَّلٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لَوْلاَ أَنَّ الْكِلاَبَ أُمَّةٌ مِنَ الأُمَمِ لأَمَرْتُ بِقَتْلِهَا فَاقْتُلُوا مِنْهَا الأَسْوَدَ الْبَهِيمَ " .
also referenced under: Hadith 2845 (DarusSalam) & Book 16, Hadith 2839 (USC-MSA)