Hadith 4:167
Ibn ‘Abbas said that a piece of red stuff was put in God’s messenger’s grave. Muslim transmitted it.
وَعَنِ ابْنِ عَبَّاسٍ قَالَ: جُعِلَ فِي قَبْرِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَطِيفَةٌ حَمْرَاء. رَوَاهُ مُسلم
Original Reference: Mishkat al-Masabih 1694