Ali 'Imran · 3:97

97. In this place of worship are clear signs of its special honour and blessings, such as the acts of worship performed in it, and its landmarks, including the stone that Abraham stood on when he was raising the walls of the Kaaba; and whoever enters it is safe, with no harm coming to them. People have a duty to Allah to perform the acts of Hajj in this House of worship, if they are able to do so. Whoever rejects the duty of Hajj disbelieves in Allah, and Allah is in no need of them or anything all in the worlds.