After Sayyiduna ‘Uthman (radi Allahu anhu) passed away, Sayyiduna Ali (radi Allahu anhu) was elected as the fourth Caliph by the Muslims. During the period of the first three Caliphs, Madinatul Munawwarah continued to be the capital of the Muslim world, but Sayyiduna Ali (radi Allahu anhu) transferred the Islamic capital to Kufah in Iraq.
Sayyiduna Ali (radi Allahu anhu) was the son of Abu Taalib, an uncle of Sayyiduna Rasulullah (sallal laahu alaihi wasallam). Sayyiduna Ali (radi Allahu anhu) was married to Sayyadah Bibi Fathima (radi Allahu anha), the daughter of Sayyiduna Rasulullah (sallal laahu alaihi wasallam). They had 3 sons, Sayyiduna Hassan, Sayyiduna Hussain and Sayyiduna Mohsin (radi Allahu anhumul ajma’in).Sayyiduna Ali (radi Allahu anhu) took part in the battle of Badr, Khandaq and Khaibar. At Khaibar, it was Sayyiduna Ali (radi Allahu anhu) who subdued the Jews with his furious assault. He also held many important positions during the time of Sayyiduna Rasulullah (sallal laahu alaihi wasallam) and the first 3 Caliphs before him.
He had a love for learning and was a great and learned person himself. He had been given the title of “Baabul I’lm” or “Gate of Learning” by Sayyiduna Rasulullah (sallal laahu alaihi wasallam). He was also called “Asaadullah” or “Lion of Allah.”
The situation in Madinatul Munawwarah after the murder (Shahaadah) of Sayyiduna ‘Uthman (radi Allahu anhu) was serious. Sayyiduna Ali (radi Allahu anhu’s) first task was to rid Madinatul Munawwarah of the rebels and to return the situation to normal.
Sayyiduna Ali (radi Allahu anhu) was able to force the rebels to withdraw from Madinatul Munawwarah and to establish peace and order in the city. The powerful governor of Syria, Sayyiduna Mu’awiyah (radi Allahu anhu), challenged Sayyiduna Ali (radi Allahu anhu) and refused to pay homage to him. Sayyiduna Mu’awiyah (radi Allahu anhu) insisted that Sayyiduna Ali (radi Allahu anhu) arrest the murderers of Sayyiduna ‘Uthman (radi Allahu anhu) and hand them over to him.
Sayyiduna Ali (radi Allahu anhu) was a man with a deep sense of justice and did not want to accuse the wrong people. He needed a peaceful period to trace the culprits. But, Sayyiduna Mu’awiyah (radi Allahu anhu) began accusing him of protecting the murderers, and in this way the old enmity between the two families were revived.
On the 17th of July 659 A.C., Sayyiduna Ali (radi Allahu anhu) overcame the Khaarijees in a battle near Nahrawan, in which, it is said, that 40 000 lives were lost.
In the early morning of the 24th of January 661 A.C., Abdul Rahman bin Muljim, a Khaariji fanatic lay in ambush in the Masjid of Kufah and stabbed Sayyiduna Ali (radi Allahu anhu) when he entered the musjid. He passed away from the wound. He was 63 years old.
Sayyiduna Ali (radi allahu anhu) lived a simple life. He refused any luxury food and wore simple clothes thinking of the poor. He should sleep on the ground and even sit on the floor. He repaired his own clothes and shoes and even did manual labour. He spent nights in Salaah and should fast for three days in a row. Honesty, piety, justice and love of truth were the main marks of his character.