When the construction of the Ka‘bah was complete, Abrahamas was instructed by God the Almighty:
“And keep My House clean for those who perform the circuits, and those who stand up and those who bow down and fall prostrate in Prayers. And proclaim unto mankind that they come for the Pilgrimage. They shall come to thee on foot, and on every lean camel, in other words upon camels who have travelled long distances, coming by every distant track.”1
This proclamation is the basis upon which the Ka‘batullah became a centre. We clearly see that after this, the Ka‘bah quickly became the religious centre of the Arabs and people began to flock to it from far off places in Arabia.
1 Al-Ḥajj (22:27-28)