Narrated Ibn 'Umar:
Allah's Apostle said: Islam is based on (the following) five (principles):
1. To testify that none has the right to be worshipped but Allah and Muhammad is Allah's Apostle.
2. To offer the (compulsory congregational) prayers dutifully and perfectly.
3. To pay Zakat (i.e. obligatory charity) .
4. To perform Hajj. (i.e. Pilgrimage to Mecca)
5. To observe fast during the month of Ramadan.

Narrated Abu Huraira:
The Prophet said, "Faith (Belief) consists of more than sixty branches (i.e. parts). And Haya (This term "Haya" covers a large number of concepts which are to be taken together; amongst them are self respect, modesty, bashfulness, and scruple, etc.) is a part of faith."

Narrated 'Abdullah bin 'Amr:
The Prophet said, "A Muslim is the one who avoids harming Muslims with his tongue and hands. And a Muhajir (emigrant) is the one who gives up (abandons) all what Allah has forbidden."

Narrated Abu Musa:
Some people asked Allah's Apostle, "Whose Islam is the best? i.e. (Who is a very good Muslim)?" He replied, "One who avoids harming the Muslims with his tongue and hands."

Narrated 'Abdullah bin 'Amr:
A man asked the Prophet , "What sort of deeds or (what qualities of) Islam are good?" The Prophet replied, 'To feed (the poor) and greet those whom you know and those whom you do not Know (See Hadith No. 27).

Narrated Anas:
The Prophet said, "None of you will have faith till he wishes for his (Muslim) brother what he likes for himself."

Narrated Abu Huraira:
"Allah's Apostle said, "By Him in Whose Hands my life is, none of you will have faith till he loves me more than his father and his children."