Sahih Bukhari Volume 3, Book 29, Hadith Number 72.

Narated By Anas bin Malik : Allah’s Apostle entered Mecca in the year of its Conquest wearing an Arabian helmet on his head and when the Prophet took it off, a person came and said, “Ibn Khatal is holding the covering of the Ka’ba (taking refuge in the Ka’ba).” The Prophet said, “Kill him.”