Sahih Muslim
The Book of Pilgrimage (Kitab Al-Hajj)
Book Number: 007 / Hadith Number: 2916
Suwaid b. Ghafala reported: I saw Umar (Allah be pleased with him) kissing the Stone and clinging to it and saying: 1 saw Allah's Messenger (may peace be upon him) having great love for you. This hadith has been narrated on the authority of Sufyin 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.