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.
muslim:222b[Chain 1] Abū Bakr b. Abū Shaybah > Wakīʿ [Chain 2] Abū Kurayb > Abū Muʿāwiyah > al-Aʿmash Bihadhā al-Isnād Ghayr > Umā

You would be no more among men (on the Day of Resurrection) but like a white hair on (the body of) a black ox, or like a black hair on (the body of) a white ox, and he made no mention of: a strip on the foreleg of an ass.  

مسلم:٢٢٢bحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا وَكِيعٌ ح وَحَدَّثَنَا أَبُو كُرَيْبٍ حَدَّثَنَا أَبُو مُعَاوِيَةَ كِلاَهُمَا

عَنِ الأَعْمَشِ بِهَذَا الإِسْنَادِ غَيْرَ أَنَّهُمَا قَالاَ مَا أَنْتُمْ يَوْمَئِذٍ فِي النَّاسِ إِلاَّ كَالشَّعْرَةِ الْبَيْضَاءِ فِي الثَّوْرِ الأَسْوَدِ أَوْ كَالشَّعْرَةِ السَّوْدَاءِ فِي الثَّوْرِ الأَبْيَضِ وَلَمْ يَذْكُرَا أَوْ كَالرَّقْمَةِ فِي ذِرَاعِ الْحِمَارِ