Salim narrated on the authority of his father (RA) that 'Umar bin al-Khattib (RA) 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 bin Aslam on the authority of his father Aslam.
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Ibn 'Umar (RA) reported that Umar (RA) kissed the Stone and said: I am kissing you, whereas I know that you are a stone, but I saw Allah's Messenger (ﷺ) kissing you (that is why I kiss you).
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Abdullah bin Sarjis reported: I saw the bald one, i. e. 'Umar bin Khattib (RA) kissing the Stone and saying: By Allah. I am kissing with full consciousness of the fact that you are a stone and that you can neither do any harm nor good; and if I had not seen Allah's Messenger (ﷺ) kissing you, I would not have kissed you. The rest of the hadith is the same.
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Abbas bin Rabi'a reported: I saw 'Umar (RA) kissing the Stone and saying: I am kissing you and I know that you are a stone. And if I had not seen Allah's Messenger (ﷺ) kissing you, I would not have kissed you.
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