Sunni view of Ali
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Sunnis maintain that Ali was among the first males to convert to Islam, when he was 8 years old and he was among the closest companions to the Islamic prophet, Muhammad at the time and to Abu Bakr, Muhammad's closest companion He is also revered in many hadiths of Muhammad such as the famous hadith: "I am a city of knowledge and Ali is its door" found in the hadith book of Tirmidhi.
Sunnis view Ali as one of the greatest warrior champions of Islam. Examples include taking on the Quraish champion at the Battle of the Trench when nobody else dared. After multiple failed attempts of breaking the fort in the Battle of Khaybar, Ali was summoned, miraculously healed and conquered the fort. 
He is also honored for marrying the daughter of Muhammed.
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