What was the action taken by the sahaba when they were with Prophet Muhammad (saw) if the Ka'ba could not be visited?
 Narrated Nafi`:                     `Abdullah bin `Umar set out for Umra during the period of afflictions, and he said, "If I should be stopped from visiting the Ka`ba, I will do what we did when we were with Allah's Apostle." He assumed Ihram for `Umra in the year of Al-Hudaibiya.