"A man asked Ibn Umar about touching the Black Stone and he said: 'I saw the Messenger of Allah touching it and kissing it.' The man said: 'What if it is too crowded and I am overwhelmed?' Ibn Umar, may Allah be pleased with him, said: 'Leave your "what if" in Yemen! I saw the Messenger of Allah touching it and kissing it.'"
Sunan an-Nasa'i Book 24, Hadith 329
← Previous Hadith "When the Prophet and his Companions came to Makkah, the idolaters said: 'The fever of Yathrib has weakened them, and they have suffered a great deal because of it.' Allah informed His Prophet about that, so he told his Companions to walk rapidly, and to walk (at a normal pace) between the two corners, and the idolaters were on the side of the Stone. They said: 'They are stronger than such and such.'"

Sunan an-Nasa'i Book 24, Hadith 328 Next Hadith → the Prophet used to touch the Yemeni Corner and the Stone in earch Tawaf.

Sunan an-Nasa'i Book 24, Hadith 330