Jami` at-Tirmidhi 860
جامع الترمذي#860SahihAbbas bin Rabi'ah said:"I saw Umar bin Al-Khattab kissing the (Black) Stone and saying: 'I am kissing you while I know that you are just a stone, and if I had not seen the Messenger of Allah kissing you, I would not kiss you
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 9:53