Q 33: What is the textual proof that Pilgrimage (Hajj) is compulsory?
A ---Allah, Most High says: {And perform properly (i.e. all the ceremonies according to the ways of Prophet Muhammad (Peace be upon him)), the Hajj and 'Umrah for Allah}. (Al-Baqarah, 196)
Allah says: {And Hajj (pilgrimage to Mecca) to the House (Ka` bah) is a duty that mankind owes to Allah, those who can afford the expenses (for one's conveyance, provision and residence)}.
The Prophet (Peace be upon him) says: "O people, Allah has made Hajj obligatory for you, so perform Hajj ". (Sahih Bukhari)
He (Peace be upon him) says: " (The superstructure of) Islam is raised on five (pillars): The Oneness of Allah, performance of Prayer, payment of Zakah, fast of Ramadan, and Pilgrimage (to Mecca) ". (Sahih Bukhari)
Reference: 200 FAQ On Muslims Belief - Shiekh Hafiz Ibn Ahmed Al Hakami