Language:
كتاب الحج
25  
Hajj (Pilgrimage)
(57)
Chapter: Doing Ramal in Tawaf during Hajj and 'Umra
(57)
باب الرَّمَلِ فِي الْحَجِّ وَالْعُمْرَةِ
Sahih al-Bukhari 1606

Narrated Nafi`:

Ibn `Umar. said, "I have never missed the touching of these two stones of Ka`ba (the Black Stone and the Yemenite Corner) both in the presence and the absence of crowds, since I saw the Prophet (ﷺ) touching them." I asked Nafi`: "Did Ibn `Umar use to walk between the two Corners?" Nafi` replied, "He used to walk in order that it might be easy for him to touch it (the Corner Stone)."

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ مَا تَرَكْتُ اسْتِلاَمَ هَذَيْنِ الرُّكْنَيْنِ فِي شِدَّةٍ وَلاَ رَخَاءٍ، مُنْذُ رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم يَسْتَلِمُهُمَا‏.‏ قُلْتُ لِنَافِعٍ أَكَانَ ابْنُ عُمَرَ يَمْشِي بَيْنَ الرُّكْنَيْنِ قَالَ إِنَّمَا كَانَ يَمْشِي لِيَكُونَ أَيْسَرَ لاِسْتِلاَمِهِ‏.‏
Reference : Sahih al-Bukhari 1606
In-book reference : Book 25, Hadith 92
USC-MSA web (English) reference : Vol. 2, Book 26, Hadith 676
  (deprecated numbering scheme)