Jami` at-Tirmidhi 858
جامع الترمذي#858SahihAbu Tufail narrated:"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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 9:51