Friday Prayer

While Umar bin Al-Khattab was standing and delivering the sermon on a Friday, one of the companions of the Prophet, who was one of the foremost Muhajirs (emigrants) came. 'Umar said to him, "What is the time now ?"
He replied, "I was busy and could not go back to my house till I heard the Adhan. I did not perform more than the ablution." Thereupon 'Umar said to him, "Did you perform only the ablution although you know that Allah's Apostle (p.b.u.h) used to order us to take a bathe (on Fridays) ?" [Bukhari]Free

Ablutions (Wudu)

Allah's Apostle said, "The prayer of person who does, Hadath (passes, urine, stool or wind) is not accepted till he performs (repeats) the ablution." A person from Hadaramout asked Abu Huraira, "What is 'Hadath' ?" Abu Huraira replied, " 'Hadath' means the passing of wind from the anus." [Bukhari]

Belief

The Prophet said, "Whoever possesses the following three qualities will taste the sweetness of faith:

1. The one to whom Allah and His Apostle become dearer than anything else.

2. Who loves a person and he loves him only for Allah's sake.

3. Who hates to revert to disbelief (Atheism) after Allah has brought (saved) him out from it, as he hates to be thrown in fire." [Bukhari]

Bathing (Ghusl)

Whenever the Prophet took a bath after Janaba he started by washing His hands and then performed ablution like that for the prayer. After that he would put his fingers in water and move the roots of his hair with them, and then pour three handfuls of water over his head and then pour water all over his body. [Bukhari]

Knowledge

Once Allah's Apostle gave a letter to a person and ordered him to go and deliver it to the Governor of Bahrain. (He did so) and the Governor of Bahrain sent it to Chousroes, who read that letter and then tore it to pieces. (The sub-natttator [Ibn Shihab] thinks that Ibn Al-Musaiyab said that Allah's Apostle invoked Allah against them (saying), "May Allah tear them into pieces, and disperse them all totally.)" [Bukhari]