Sahih Bukhari: Volume 1, Book 8, Number 392:

Narrated Bara' bin 'Azib:

Allah's Apostle prayed facing Baitul-Maqdis for sixteen or seventeen months but he loved to face the Ka'ba (at Mecca) so Allah revealed: "Verily, We have seen the turning of your face to the heaven!" (2:144) So the Prophet faced the Ka'ba and the fools amongst the people namely "the Jews" said, "What has turned them from their Qibla (Bait-ul-Maqdis) which they formerly observed"" (Allah revealed): "Say: 'To Allah belongs the East and the West. He guides whom he will to a straight path'." (2:142) A man prayed with the Prophet (facing the Ka'ba) and went out. He saw some of the Ansar praying the 'Asr prayer with their faces towards Bait-ul-Maqdis, he said, "I bear witness that I prayed with Allah's Apostle facing the Ka'ba." So all the people turned their faces towards the Ka'ba.

Sahih Muslim: Book 004, Number 1540:

Abu Qatada (a Companion of the Prophet) reported Allah's Messenger (may peace be upon him) as saying:

When any one of you enters the mosque, he should observe two rak'ahs (of Nafl prayer) before sitting.

Sahih Bukhari: Volume 1, Book 10, Number 505:

Narrated 'Abdullah:

I asked the Prophet "Which deed is the dearest to Allah?" He replied, "To offer the prayers at their early stated fixed times." I asked, "What is the next (in goodness)?" He replied, "To be good and dutiful to your parents" I again asked, "What is the next (in goodness)?" He replied, 'To participate in Jihad (religious fighting) in Allah's cause." 'Abdullah added, "I asked only that much and if I had asked more, the Prophet would have told me more."

Sahih Bukhari: Volume 1, Book 8, Number 466:

Narrated Abu Huraira:

The Prophet said, "The prayer offered in congregation is twenty five times more superior (in reward) to the prayer offered alone in one's house or in a business center, because if one performs ablution and does it perfectly, and then proceeds to the mosque with the sole intention of praying, then for each step which he takes towards the mosque, Allah upgrades him a degree in reward and (forgives) crosses out one sin till he enters the mosque. When he enters the mosque he is considered in prayer as long as he is waiting for the prayer and the angels keep on asking for Allah's forgiveness for him and they keep on saying: 'O Allah! Be Merciful to him, O Allah! Forgive him, as long as he keeps on sitting at his praying place and does not pass wind.

Sahih Bukhari: Volume 1, Book 8, Number 424:

Narrated Ibn 'Umar:

The Prophet had said, "Offer some of your prayers (Nawafil) at home, and do not take your houses as graves."

Sahih Muslim: Book 004, Number 1607:

Abu Salama b. Abd al-Rahman asked 'A'isha about the (night) prayer of the Messenger of Allah (may peace be upon him) during the month of Ramadan. She said: The Messenger of Allah (may peace be upon him) did not observe either in Ramadan or in other months more than eleven rak'ahs (of the night prayer). He (in the first instance) observed four rak'ahs. Ask not about their excellence and their length (i. e. these were matchless in perfection and length). He again observed four rak'ahs, and ask not about their excellence and their length. He would then observe three rak'ahs (of the Witr prayer). 'A'isha again said: I said: Messenger of Allah, do you sleep before observing the Witr prayer? He said: O 'A'isha, my eyes sleep but my heart does not sleep.