Islamic Studies
The Five Pillars of Islam – First Pillar: Shahadah (Kalimah Tayyibah)
Explanation
Hajj was made obligatory in 9 AH. The Quranic verse (3:97) states: "Pilgrimage to this House is an obligation upon Allah for those who are able to find a way."
Reference: Five Pillars of Islam Notes
, Page 5