Hadees Related to Pillars of Islam

Abdullah Ibne-'Umar R.A narrates that Rasulullah Sallallahu 'alaihi wasallam said: Islam has been built upon five pillars:  
1) To testify that none is worthy of worship but ALLAH and that Muhammad is the Messenger of ALLAH, 
2) to establish salat, 
3) to give Zakat, 
4) to perform Hajj, and 5) to fast (Saum) in Ramadan. (Bukhari)