Narrated Abu Huraira: I heard Allah's Apostle saying, "The rights of a Muslim on the Muslims are to follow the funeral processions, to accept invitation and to reply the sneezer. (Bukhari Vl 2,No 332)
Abud-Darda (May Allah be pleased with him) reported: The Messenger of Allah (peace be upon him) said, "Shall I not inform you of the best of your actions which are the purest to your Rubb, which exalt you to the high ranks, which are more efficacious than spending gold and silver (in charity), and better for you than you should encounter your enemies whom you will smite their necks and they will smite your necks?'' They said, "Certainly.'' He (PBUH) said, "Remembrance of Allah the Exalted.''
Narated By 'Aisha : Allah's Apostle (peace be upon him) used to pray eleven Rakat at night and that was his night prayer and each of his prostrations lasted for a period enough for one of you to recite fifty verses before Allah's Apostle raised his head. He also used to pray two Rakat (Sunna) before the (compulsory) Fajr prayer and then lie down on his right side till the Muadh-dhin came to him for the prayer.
[Sahih Al-Bukhari Volumn 002, Book 016, Hadith Number 108]