Hazrat Ali (AS) was not only a gallant warrior but also an orator of the first rank. His speech was always impressive and convincing. It had fascination for the polytheists also. They flocked round him and listened to the great Message of Islam from Hazrat Ali (AS)’s eloquent tongue and embraced Islam. He always strove hard to convert the infidels to Islam. He acquainted them with the true and noble spirit and golden principles of this great religion. Whenever the Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam) sent him to any country for the propagation of Islam, he succeeded with distinction that none other could do this job with great success. It was as a result of his efforts that the entire inhabitants of the Yemen accepted Islam and he won a good deal of respect and reverence. In the year 9 A.H., the first pilgrimage to Mecca was performed. By this time, Allah had prohibited the idolaters to enter the Kabah. It was quite necessary to communicate this commandment of Allah to the people who had gone for pilgrimage. Someone out of the companions spoke: If Hazrat Abu Bakr (RA) were here he would go to Mecca to communicate this commandment. The Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam) interrupted him immediately and stated that none other has this right but my Holy Family Members to communicate any commandment of Allah to the people. However, the Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam) appointed Hazrat Ali (AS) as his Deputy to discharge this mission. He rode on Qaswa, the camel of the Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam) and visited various places to convey this message. He accomplished this task within a short span of time. After this, he was instrumental in converting the tribes of Hamdan to Islam.
During the Farewell Pilgrimage, he proceeded towards Mecca with the Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam) where the Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam), on the revelation of Quranic Order, publicly and openly declared to the companions: “Whose Master I am, Ali (AS) is the master of him” and also prayed to Allah at that time: “O Allah, you love Ali (AS) and also love those who love Ali (AS) and help Ali (AS) and also help those who help Ali (AS). On the way back, Hazrat Ali (AS) also accompanied him when he returned and fell ill on the way. He looked after him constantly. When his Master breathed his last, Hazrat Ali (AS) with the assistance of his uncle Hazrat Abbas (RA) and Angle Jibreel-e-Ameen (AS), had the privilege of completing funeral arrangements for the holy grave of the Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam). The companions called Sahaba Kiraam, were at that time busy in deciding at Saqifa Bani Sada as to who would be the first Caliph, totally ingnoring Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam)’s declaration announced on the event of his pilgrimage i.e. “Whose Master I am, this Ali is the master of him”. This was the beginning of creating an atmosphere to disobey Holy Prophet (Suallu Alaihe Wa Aalehi Wasallam) and Allah, and paving a path for mischiefs in Islam. The path of mischiefs was later used by various hypocrites and miscreants against Hazrat Ali (AS) by waging wars and for hindering Hazrat Ali (AS) from rendering his services for the cause of True Religion – Islam which Almighty Allah sent through 124000 Messengers/Prophets for the best guidance of the mankind. But Hazrat Ali (AS), being a unique personality with unique and matchless qualities, faced all obstacles that came on his way and crushed them with sword. Even in such sensitive situations, Hazrat Ali (AS) also continued rendering services for the cause of Islam.