From Sahih Muslim (Hadith 3067):
Salim narrated on the authority of his father (Allah be pleased with him) that 'Umar b. al-Khattib (Allah be pleased with him) kissed (the Black Stone) and then said:By Allah, I know that you are a stone and if I were not to see Allah's Messenger (ﷺ) kissing you, I would not have kissed you. Harun said in his narration: A hadith like this has been transmitted to me by Zaid b. Aslam on the authority of his father Aslam
Reference: Muslim 3067