The obligation of Hajj is confirmed by the Quran and the Sunnah of the Messenger of Allah, as well as the consensus agreement of Muslim scholars. Whoever denies the obligation of Hajj will be regarded an infidel, and whoever abandons it because of his indifference to it, though he admits its obligation, is on the verge of disbelief.
Allah the Almighty says which translates as:
“Pilgrimage is an obligation that Allah imposed on people who can afford the journey; but if any denies this obligation, Allah does not need anything from His creatures.” (Aal-`Imraan: 97).
The Prophet said : that Islam is founded on five pillars, and that if any of these five is lacking your Islam will not be complete.
Umar bin Al-Khattab (may Allah be pleased with him) said: “ I was about to send envoys to check on all those who have the means to make Hajj but do not perform it, in order to demand them to pay Jizyah; they are not Muslims, they are not Muslims.”