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:103a[Chain 1] Yaḥyá b. Yaḥyá > Abū Muʿāwiyah [Chain 2] Abū Bakr b. Abū Shaybah > Abū Muʿāwiyah And Wakīʿ [Chain 3] Ibn Numayr > Abū > al-Aʿmash > ʿAbdullāh b. Murrah > Masrūq > ʿAbdullāh

He is not one of us (one among the Ummah of Islam) who beat the cheeks or tore the front opening of the shirt or uttered the slogans of (the days of) Jahiliya (ignorance). Ibn Numair and Abu Bakr said (instead of the word" au" (or) it is" wa" [and] the words are) and tore and uttered (the slogans) of Jahiliya without" alif".  

مسلم:١٠٣aحَدَّثَنَا يَحْيَى بْنُ يَحْيَى أَخْبَرَنَا أَبُو مُعَاوِيَةَ ح وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا أَبُو مُعَاوِيَةَ وَوَكِيعٌ ح وَحَدَّثَنَا ابْنُ نُمَيْرٍ حَدَّثَنَا أَبِي جَمِيعًا عَنِ الأَعْمَشِ عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ عَنْ مَسْرُوقٍ عَنْ عَبْدِ اللَّهِ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ لَيْسَ مِنَّا مَنْ ضَرَبَ الْخُدُودَ أَوْ شَقَّ الْجُيُوبَ أَوْ دَعَا بِدَعْوَى الْجَاهِلِيَّةِ هَذَا حَدِيثُ يَحْيَى وَأَمَّا ابْنُ نُمَيْرٍ وَأَبُو بَكْرٍ فَقَالاَ وَشَقَّ وَدَعَا بِغَيْرِ أَلِفٍ