Blessing on the Prophet, and its Excellence - Section 1 Mishkat al-Masabih 921
Arabic hadith text
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ صَلَّى عَلَيَّ وَاحِدَةً صَلَّى اللَّهُ عَلَيْهِ عشرا» . رَوَاهُ مُسلم
Translation
Abu Huraira reported God’s Messenger as saying, “If anyone invokes blessing on me once, God will bless him ten times.” Muslim transmitted it.