And when We made the House a pilgrimage for men and a (place of) security, and: Appoint for yourselves a place of prayer on the standing-place of Ibrahim. And We enjoined Ibrahim and Ismail saying: Purify My House for those who visit (it) and those who abide (in it) for devotion and those who bow down (and) those who prostrate themselves.

And it does not beseem the believers that they should go forth all together; why should not then a company from every party from among them go forth that they may apply themselves to obtain understanding in religion, and that they may warn their people when they come back to them that they may be cautious?