Abu Jandal was an early convert to Islam, following the lead of his brother Abdullah ibn Suhayl. Due to the position of their father Suhayl ibn Amr in the leadership of Quraysh, Abu Jandal and Abdullah were persecuted and hid their conversion. Abdullah converted to Islam and cleverly rode with the vanguard of Quraysh to Badr where he switched sides and joined the Prophet and battled against the pagans of Quraysh and his father the next day. When Suhayl learned that his second son was a Muslim, he had him beaten and locked at home. Abu Jandal remained in this state under close watch and harsh punishment for several years until the time of the Treaty of Hudabiyyah. Hearing that the Prophet Muhammad was near Mecca and coming, Abu Jandal, bound in chains escaped and ran to the camp of the Muslims at Hudaybiyyah. The Muslims were shocked to see his condition. According to the treaty, any Meccans who attempted to become Muslim and flee to Medina without the permission of his guardian would be returned to Mecca. Upon seeing his son and understanding that he was attempting to flee to the security of the Prophet, Suhayl pointed at his son and informed them that he would be the first person returned to Quraysh. Abu Jandal exclaimed to the Muslim people that they would return him to the polytheists when he comes to them as a Muslim. Unfortunately, the Prophet had to return Abu Jandal but encouraged him to remain steadfast. After some time, Abu Jandal and the other people who had been returned to Mecca thought that they would simply escape from Mecca and settle somewhere other than Medina. In doing this, they were able to escape their persecution and allow the treaty to stay intact and keep themselves from being returned to Mecca. Abu Jandal and others led by Abu Baseer gathered at a small town near the Jeddah coast called Ghufar, and their news spread to others wishing to escape Mecca as Muslims. Eventually, this group of about 70 men with Abu Baseer and Abu Jandal formed a raiding party to ravage the Meccan trade caravans on their way to and from Syria. For almost a year, Quraysh was unable to get passed Abu Jandal and his peers, crushing the Meccan economy. Quraysh then wrote the Prophet in Medina asking him to please welcome the men at Ghufar into Medina and allow them to join him away from the Meccan caravans. Abu Baseer died soon after reading the Prophet's invitation to Medina, and Abu Jandal led the caravan of men and all of the wealth they had amassed to Medina. When they arrived at Medina, Abu Jandal greeted and reunited with his brother, Abdullah. For some time, Abu Jandal, Abdullah and every other companion of the Prophet remained in Medina. But some time later, Abdullah and Abu Jandal come back to their home in Mecca and persuaded their father to meet the Prophet and convert to Islam and they succeeded. Later, in 632, Abdullah went to and was martyred in the Battle of Al-Yamamah. Abu Jandal heard the news of his brother's martyrdom and informed his father of it. Both Abu Jandal and his father, Suhayl, mourned Abdullah and then decided to join the Muslim army. Therefore, they fought in all or almost every following battle, such as the Battle of Al-Yarmuk.
