Yahya related to me from Malik from Hisham ibn Urwa that his father used to salute all the corners when he did tawaf of the House and did not omit the Yamani corner unless he was prevented from it.
Muwatta Malik Book 20, Hadith 118
← Previous Hadith Yahya related to me from Malik from Hisham ibn Urwa that his father said that the Messenger of Allah, may Allah bless him and grant him peace, once said to Abd ar-Rahman ibn Awf, "What do you do, Abu Muhammad, when saluting the corner?" and Abd ar-Rahman said, "Sometimes I salute it, and sometimes I don't." The Messenger of Allah, may Allah bless him and grant him peace, said, "You are right."

Muwatta Malik Book 20, Hadith 117 Next Hadith → Yahya related to me from Malik from Hisham ibn Urwa from his father that Umar ibn al-Khattab said to the corner of the Black Stone while he was doing tawaf of the House, "You are only a stone, and if I had not seen the Messenger of Allah, may Allah bless him and grant him peace, kiss you, I would not do so." Then he kissed it.

Malik said, "I have heard some of the people of knowledge recommending someone doing tawaf of the House to put his hand to his mouth when he takes it from the Yamani corner."

Muwatta Malik Book 20, Hadith 119