Banu Bakr
In 629 CE, The Banu Bakr tribe, an ally of Quraysh, attacked the Muslims' ally tribe Banu Khuza'a, and killed several of them. The Quraysh openly helped Banu Bakr in their attack, which in return, violated the terms of the Treaty of Hudaybiyyah. Of the three options now advanced by Muhammad, they decided to cancel the Treaty of Hudaybiyyah. Muhammad started taking preparation for Mecca campaign. On 29 November 629 (6th of Ramadan, 8 AH), Muhammad set out with 10,000 companions, and stopped at a nearby place from Mecca called Marr-uz-Zahran. When Meccan leader Abu Sufyan came to gather intelligence, he was detected and arrested by the guards. Umar ibn al-Khattab wanted the execution of Abu Sufyan for his past offenses, but Muhammad spared his life after he converted to Islam. On 11 December 629 (18th of Ramadan, 8 AH), he entered Mecca almost unresisted, and declared a general amnesty for all those who had committed offences against Islam and himself. He then destroyed the idols – placed in and around the Kaaba – reciting the Quranic verse: "Say, the truth has arrived, and falsehood perished. Verily, the falsehood is bound to perish" (Quran ). William Muir comments, "The magnanimity with which Muhammad treated a people who had so long hated and rejected him is worthy of all admiration."