Mishkat al-Masabih
Mishkat al-Masabih 4358
Arabic hadith text
وَعَنِ الْبَرَاءِ بْنِ عَازِبٍ: أَنَّ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ الْمِيثَرَةِ الْحَمْرَاءِ. رَوَاهُ فِي شرح السّنة
Translation
Al-Bara ibn Azib reported that the Prophet ﷺ forbade red mayathir, decorative saddle cushions or coverings. It is transmitted in Sharh al-Sunna.