حَدَّثَنَا أَحْمَدُ بْنُ عَبْدَةَ، أَخْبَرَنِي عَمْرُو بْنُ النُّعْمَانِ، حَدَّثَنَا عَلِيُّ بْنُ الْحَزَوَّرِ، عَنْ نُفَيْعٍ، عَنْ عِمْرَانَ بْنِ الْحُصَيْنِ، وَأَبِي، بَرْزَةَ قَالاَ خَرَجْنَا مَعَ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ فِي جِنَازَةٍ فَرَأَى قَوْمًا قَدْ طَرَحُوا أَرْدِيَتَهُمْ يَمْشُونَ فِي قُمُصٍ فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ أَبِفِعْلِ الْجَاهِلِيَّةِ تَأْخُذُونَ - أَوْ بِصُنْعِ الْجَاهِلِيَّةِ تَشَبَّهُونَ - لَقَدْ هَمَمْتُ أَنْ أَدْعُوَ عَلَيْكُمْ دَعْوَةً تَرْجِعُونَ فِي غَيْرِ صُوَرِكُمْ ‏"‏ ‏.‏ قَالَ فَأَخَذُوا أَرْدِيَتَهُمْ وَلَمْ يَعُودُوا لِذَلِكَ ‏.‏

It wasnarrated that ‘Imran bin Husain and Abu Barzah said: “We wentoutwith the Messenger of Allah (PBUH) to attend a funeral, and he sawsome people who had cast aside their upper sheets and were walking intheir shirts only. The Messenger of Allah (PBUH) said: ‘Are youadopting the practice of the days of ignorance?’ or; ‘Are youimitating the behaviour of the days of ignorance? I was about tosupplicate against you that you would return in a different form.’Sothey put their sheets back on and never did that again.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 6 Hadith 1485
Web Ref:  Sunan Ibn Majah Vol 1 Book 6 Hadith 1485