Abdul Hameed bin Dinar al-Ziyadi عبد الحميد بن دينار صاحب الزيادي · The Book on Hajj

"I was with Ibn Abbas, and Mu'awiyah would not pass any corner without touching it. So Ibn Abbas said to him: 'the Prophet would not touch any besides the Black Stone and the Yemeni corner.' So Mu'awiyah said: 'There is no part of the House that is untouchable.'"