Sunni view of Ali

When Muhammad died in 632, Ali had his own claims to leadership,[22][23] apparently in reference to Muhammad's announcement shortly before his death at the Ghadir Khumm.[23][24] Ali thus opposed the caliphate of Abu Bakr, who was hastily elected in the absence of Ali and the rest of Muhammad's kin.[25] Perhaps in the interest of the Muslim unity,[22][26] Ali eventually accepted the temporal rule of the first three caliphs,[27] but without giving up his claims as the designated successor of Muhammad.[27] In particular, even though Ali may have advised Abu Bakr and Umar on government and religious matters,[28][29] the conflicts between him and the first two caliphs are also well-documented,[30][31][32] but largely downplayed in Sunni sources,[33][34] in line with their tendency to neutralize the conflicts among companions.[34][35][36] These conflicts were epitomized during the proceedings of the electoral council in 644, when Ali refused to be bound by the precedence of the first two caliphs.[37][38] Ali was also critical of Uthman,[2][1][39] and in this he was joined by most of the senior companions.[1][40] In early Sunni sources, Ali is portrayed as a restraining influence on Uthman without directly opposing him.[41] By contrast, Shia Islam views Ali as the rightful successor of Muhammad and views his predecessors as usurpurs of Ali's rights.[1]

Ali and his three predecessors are acknowledged in Sunni tradition as the Rashidun caliphs,[1] that is, those Muslim rulers who are thought to have fulfilled the moral, religious, and judicial qualifications for a just rule.[42] Legal decisions of Ali are thus considered binding in Sunni Islam,[42][43] and sayings attributed to Ali are often cited by Sunni scholars to counter Shia positions.[1] This acceptance of Ali, however, appears to be a late development in Sunni Islam,[1] probably dating to the ninth century.[44] Indeed, as far as the Umayyads were concerned, their rule began with Uthman, and Ali was a mere pretender.[45] Similarly, many proto-Sunnis considered Uthman as the last of the Rashidun caliphs.[46] By contrast, the Murji'a (lit. 'deferrers') deferred judgment about the early caliphs in the interest of Muslim unity.[47] Their position was incorporated into Sunni thought by the prominent traditionist Ahmad ibn Hanbal (d. 855), who created a hierarchy of companions in which Abu Bakr, Umar, and Uthman are placed immediately above Ali,[1][48] each of the four being the most meritorious person of their time.[49] Through this hierarchy, Ali was eventually accommodated in Sunni Islam, alongside those companions who fought against him,[44][11] about whom Sunnis are expected to defer judgment,[44] lest they stoke further unrest and division in the Muslim community.[11] The Sunni hierarchy of companions is challenged by those prophetic sayings that elevate Ali above others, including, "I am from Ali and Ali is from me," and "Whoever counts me as his patron (mawla), then Ali is his patron." These hadiths have been reinterpreted accordingly. For instance, some Sunni scholars have linked the word mawla to the financial dependence of Ali on Muhammad, who raised the former in his household as a child. Yet other Sunni authors acknowledge the religious prominence of Ali but do not consider that a basis for political succession.[1]

Umar is said to have praised Ali as the "best of judges."[50] The Mu'tazilite scholar Ibn Abi al-Hadid (d. 1258) writes in his commentary on Nahj al-balagha that Ali corrected a ruling by Umar for a woman accused of adultery, after which the second caliph said, "Were it not for Ali, Umar would indeed have been destroyed."[51] Muhammad al-Shafi'i (d. 820), founder of one of the four schools of Sunni jurisprudence, commended Ali as "the best imam, the best guide,"[52] and composed a poem in his praise.[53] In reference to the statement attributed to Ali, "Ask me about anything till I am among you," Ahmad ibn Hanbal (d. 855), founder of another Sunni school, writes that Ali was the only companion who made this claim, thus suggesting that Ali was the only companion who was qualified to make such a claim.[54] Ibn Hanbal also commented about the caliphate of Ali, "Do you think the caliphate adorned Ali? No, rather it was Ali who adorned the caliphate."[55]