The polytheists are indeed unclean...

The polytheists are indeed unclean, so they shall not approach the Sacred Mosque after this year, and if you fear poverty, then Allah will enrich you out of His grace if He pleases; verily Allah is All-Knowing, All-Wise.”*** One of the four commandments that Ali (as) conveyed to the people of Mecca in the rites of Hajj (pilgrimage) in the ninth year A.H. was that from the year followed no pagan was allowed to enter the Holy Mosque and to circumambulate the Ka‘bah.

This verse has pointed to this matter and its philosophy. It says: “O’ you who have Faith! The polytheists are indeed unclean, so they shall not approach the Sacred Mosque after this year…” Then, in response to those shortsighted persons who said with the absence of pagans in the Sacred Mosque their business and trading would decline and they would become poor and miserable, the Qur’ān says: “…and if you fear poverty, then Allah will enrich you out of His grace if He pleases...” And He did…