What was the custom of Abdullah bin `Umar when he used to pass through the mountain pass where Prophet Muhammad (saw) went?
 Narrated Nafi`:                     `Abdullah bin `Umar used to offer the Maghrib and `Isha' prayers together at Jam' (Al-Muzdalifa). But he used to pass by that mountain pass where Allah's Apostle went, and he would enter it and answer the call of nature and perform ablution, and would not offer any prayer till he had prayed at Jam.'