"Narrated Anas bin Malik: 'On the day of the Conquest, the Prophet entered Mecca, wearing a helmet on his head. When he took it off, a man came and said, "Ibn Khatal is clinging to the curtain of the Ka'ba." The Prophet said, "Kill him."'" (Hadith Sahih al-Bukhari Vol. 5, Book 59, No. 582)