كتاب الحج
15  
The Book of Pilgrimage
(41)
Chapter: It is recommended to kiss the black stone during circumambulation (Tawaf)
(41)
باب اسْتِحْبَابِ تَقْبِيلِ الْحَجَرِ الأَسْوَدِ فِي الطَّوَافِ ‏
Sahih Muslim 1271 b

This hadith has been narrated on the authority of Sufyan with the same chain of transmitters (and the words are):

" That he ('Umar) said: But I saw Abu'l-Qasim (way peace be upon him) having great love for you." And he did not mention about clinging to it.
وَحَدَّثَنِيهِ مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، عَنْ سُفْيَانَ، بِهَذَا الإِسْنَادِ قَالَ وَلَكِنِّي رَأَيْتُ أَبَا الْقَاسِمِ صلى الله عليه وسلم بِكَ حَفِيًّا ‏.‏ وَلَمْ يَقُلْ وَالْتَزَمَهُ ‏.‏
Reference : Sahih Muslim 1271b
In-book reference : Book 15, Hadith 278
USC-MSA web (English) reference : Book 7, Hadith 2916
  (deprecated numbering scheme)