Messenger of Allah ﷺ said, "While I was sleeping I saw (in a dream) some people wearing shirts of which some were reaching up to the breasts only while others were even shorter than that. Umar bin Al-Khattab was shown wearing a shirt that he was dragging." The people asked, "How did you interpret it? (What is its interpretation) O Messenger of Allah ﷺ?" He (the Prophet ﷺ ) replied, "It is the Religion." (Using translation from Bukhārī 23)   

أَنَّهُ سَمِعَ رَسُولَ اللهِ ﷺ قَالَ «بَيْنَا أَنَا نَائِمٌ رَأَيْتُ النَّاسَ يُعْرَضُونَ عَلَيَّ وَعَلَيْهِمْ قُمُصٌ مِنْهَا مَا يَبْلُغُ الثُّدِيَّ وَمِنْهَا مَا يَبْلُغُ دُونَ ذَلِكَ عَرَضَ عَلَيَّ عُمَرُ بْنُ الْخَطَّابِ وَعَلَيْهِ قَمِيصٌ يَجُرُّهُ» قُلْتُ فَمَا أَوَّلْتَ يَا رَسُولَ اللهِ؟ قَالَ «الدِّينُ»