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♥