In the name of God
The greatness of Islam and the expiration of Christianity were marked by the event of Mubahala!
 Dhi Hijjah 24 is the day of “Mubahala”.
The Prophet’s Mubahala with the Christians of Najran in the tenth year of Hijra and their defeat and submission to the legitimacy of Islam is a sign of the greatness of Islam and the finality of this religion and the expiry of Christianity.
 Notice the meaning of “Mubahala”:
The “Mubahala” is that two people or two groups, after debating and arguing against each other, do not reach a conclusion that is acceptable to the parties and each claim that the other party is “deliberately” concealing the right, then to substantiate their claim they give the issue over to God and each of the parties asks God that if the other deliberately lies in his claim and conceals the right, immediately the retribution will come to him so that the truth can be clarified, it is the belief of divine religions that in such cases God will respond immediately to issue an ultimatum to the people, this happened many times in the days of the past prophets and their opponents were doomed with divine miracles (the stories of past prophets and the torment of the deniers of their Ummah exist in the Koran and books of the Old and New Testaments), but in the 23-year-old history of Prophet Muhammad Mubahala happened only once and that happened with the Christians of Najran.
Najran is a person’s name. He was the initiator of promoting a territory, 4000 years old, in the north of Yemen and 800 kilometers south of Mecca. This area had 73 villages at the time of the emergence of Islam and was regarded as a major trading market for Yemen, Hejaz, Sham, Iran and Rome, with the proclamation of Prophet Jesus’s prophecy the Najranis believed in him and, because of its position, Najran gradually became one of the most important bases of Christianity in the world, after the spread of Islam, that vast region was officially the center of a religious state, its head was Archbishop Hasin ibn Alqimah and two other bishops named Sayyid and Aqeb were in charge of all the affairs of Najran, the ever-growing greatness of Islam had caused them discomfort, and in distress, they waited every moment for a message from the Prophet of Islam until at the end of the ninth year, the divine command to invite the people of Najran to Islam was sent to the Prophet, the Prophet sent them a letter inviting them to Islam, upon reaching the letter, the Archbishop, for his decision, first consulted three first-rate counselors and then with the general Christian public in the cathedral. They themselves, knew the Prophet well, in light of the evidences in their Scriptures about the coming of Prophet Muhammad after Jesus but were certain that if they accepted the right, they would end their religious and economic life willfully, hence, much of their focus was on the war with Islam, until a Christian scholar called Hareseh proposed converting to Islam provided the Prophet was the one who was evangelized in their books, there was a lot of discussion until they decided to bring a collection of scriptures called Jame’eh and Zajereh and scrutinize them thoroughly, after studying all the books they became convinced that in 5 parts of these books the name of the prophet after Jesus is Muhammad and Ahmad, and his descendants are said to be from his daughter Fatima and his son-in-law Ali and God gives him two grandchildren named Hassan and Hossein and that Imams are descendants of Hossein and Hazrat Mahdi is the twelfth Imam through whom God makes the earth full of justice and equity.

With this matching, the proposal of war went out of their minds, and the Archbishop, Hasin ibn Alqama, and Sayyid and Aqeb, along with 88 others, were decided to go to Medina to see the Prophet and further research and quickly prepared and departed.

After the first meeting with the 88 people in Medina and before any discussion, Prophet Mohammed suggested that they ask people in the city about him for 3 days and return on the fourth day, and they accepted. On the fourth day, the Prophet spoke about the good news of his coming which was in the books of “Jame’eh and Zajereh” and they accepted everything except the fact that Jesus was not the child of God and said that they were ready to do “Mubahala” with him about it. The Prophet accepted it without delay. They feared his speed of accepting, and delayed it until the next day to consult one another. The Prophet ordered to prepare a place next to Baqi’ (cemetery). In the morning, the group of Najranis arrived first. They were saying to themselves “We should see with whom the Prophet will come. If he comes with the population of about 70,000 people in Medina, he has the intention of showing his retinue, and if he comes with his family, no.”

Suddenly they saw a scene which stunned them. They saw the Prophet coming forward with dignity. Ali a step behind, on the right side. Lady of both worlds, Zahra, behind him. Two boys (Imam Hassan and Imam Hussein) beside them.

They were terrified by the dignified movement of this group of 5 people, the Prophet entered the place, sat down, the others ringed around, the Prophet propelled the Yemeni cloak (aba) on his head and others’, all extended their hands to the heaven, Najranis were so stunned that they didn’t realize they were shaking for a while! From the state of horror they saw in themselves they felt the effects of God’s torment had been manifested, their elders looked at each other, they had no doubt that if the Prophet uttered the curse, there would be no trace of Christianity and the torment was inevitable; their elder dragged himself trembling to the Prophet and announced his renunciation of Mubahala, and expressed his readiness to accept whatever the Prophet might say, the people of Medina, who had gathered round the spot from a while back, became so happy with the victory of Islam and the breakdown of Christianity that hugged each other, the Prophet said he would send his representative the next day to tell them his conditions.

The next day, the Prophet got Ali to arrange a contract according to which the Najran Christians, in return for the security they had thanks to Islam, each year paid 2 thousand Hollahs (each Hollah was roughly 40 Dirhams – one piece of cloth for an article of clothing) as jizyah (taxation on permanent non-Muslim subjects), as well as the payment of 30 armors and spears, and 30 horses and 30 camels.