Muslim, Abu Dawud, At-Tirmidhi and An-Nasa'i recorded that Abu Hurayrah, may Allah be pleased with him, said: "The Messenger of Allah said:

«مَنْ صَلَّى عَلَيَّ وَاحِدَةً صَلَّى اللهُ عَلَيْهِ بِهَا عَشْرًا»

(Whoever sends one Salah upon me, Allah will send ten upon him.) At-Tirmidhi said: "This is a Sahih Hasan Hadith. On the same topic, narrations come from `Abdur-Rahman bin `Awf, `Amir bin Rabi`ah, `Ammar, Abu Talhah, Anas and Ubayy bin Ka`b.''