Sahih Bukhari 1607

Abu Ash-Sha'tha said, Who keeps away from some portion of the Ka'bah? Mu'awiya used to touch the four corners of the Ka'bah, Ibn 'Abbas said to him, These two corners (the one facing the Hijr) are not to be touched. Mu'awiya said, Nothing..

Narrated Salim bin `Abdullah that his father said: I have not seen the Prophet touching except the two Yemenite Corners (i.e. the ones facing Yemen). ..

Narrated Zaid bin Aslam that his father said: I saw `Umar bin Al-Khattab kissing the Black Stone and he then said, (to it) 'Had I not seen Allah's Apostle kissing you, (stone) I would not have kissed you.' ..

Narrated Az-Zubair bin 'Arabi: A man asked Ibn `Umar about the touching of the Black Stone. Ibn `Umar said, I saw Allah's Apostle touching and kissing it. The questioner said, But if there were a throng (much rush) round the Ka`ba and the..

Narrated Ibn `Abbas: The Prophet performed Tawaf of the Ka`ba while riding a camel, and whenever he came in front of the Corner, he pointed towards it (with something). ..

Narrated Ibn `Abbas: The Prophet performed Tawaf of the Ka`ba riding a camel, and every time he came in front of the Corner (having the Black Stone), he pointed towards it with something he had with him and said Takbir. ..