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.
tabarani:10261ʿUbayd b. Ghannām b. Ḥafṣ b. Ghiyāth

[Machine] If the Messenger of Allah ﷺ found that a man's shoulder was slightly higher than that of his companion, he would straighten it and say, "Do not differ, for it will cause disagreement in your hearts."  

الطبراني:١٠٢٦١حَدَّثَنَا عُبَيْدُ بْنُ غَنَّامِ بْنِ حَفْصِ بْنِ غِيَاثٍ قَالَ وَجَدْتُ فِي كِتَابِ عَمِّي عُمَرَ بْنِ حَفْصٍ بِخَطِّهِ عَنْ أَبِيهِ عَنْ مِسْعَرٍ حَدَّثَنِي عَمْرُو بْنُ مُرَّةَ عَنْ أَبِي عُبَيْدَةَ عَنْ عَبْدِ اللهِ قَالَ

إِنْ كَانَ رَسُولُ اللهِ ﷺ لَيَجِدُ مَنْكِبَ الرَّجُلِ مَائِلًا عَنْ مَنْكِبِ صَاحِبِهِ فَيُثَقِّفُهَا وَيَقُولُ «لَا تَخْتَلِفُوا؛ فَتَخْتَلِفَ قُلُوبُكُمْ»