Bahrain. After the fall of Musailma and the overthrow of the Banu Hanifa, Abu Bakr decided that a campaign should be undertaken against the people of Bahrain who had supported Musailma in the fight against the Muslims. Bahrain comprised the coastal strip to the west of the Persian Gulf. During the lifetime of the Holy Prophet. Mundhir bin Sawa w as the ruler of Bahrain. The Holy Prophet sent a mission to Bahrain, and invited Mundhir to Islam. Mundhir accepted the call and was converted to Islam. Mundhir continued to be the ruler of Bahrain under the suzerainty of Madina. Under the influence of Mundhir most of the people of Bahrain accepted Islam. He deputed Jarud bin Mualia a scholar of Bahrain to study Islam at Madina. Jarud returned to his people after some time, and made dedicated efforts to promote Islam with his people The Holy Prophet appointed Al 'Ala bin Al Hadrami as the Resident at the court of Bahrain.

After the death of the Holy Prophet. Mundhir died soon after the death of the Holy Prophet His death led to anarchy and chaos, and like the people of the other regions in Arabia, most of the people of Bahrain also apostatized. Jarud remained steadfast in his faith in Islam. His tribe, however, wavered in their allegiance to Islam. The argument of his tribe Abdul Qais was that if Muhammad (peace be on him) had been a Prophet, he would not have died. Jarud asked, "There were prophets before Muhammad (peace be on him); where have they gone?" They said that they had died. Thereupon Jarud said, "As other prophets before him died, so Muhammad (peace be on him) has also died. If the deaths of the other prophets could not affect their prophethood, how can the death of Muhammad(peace be on him) affect his prophethood? I testify that there is no god but Allah and that Muhammad (peace be on him)whether dead or alive is His messenger." The argument of Jarud carried weight with his tribe, and they continued their allegiance to Islam. The other people of Bahrain repudiated their allegiance to Islam, and revolted under the leadership of Al Hotam b Dubayah. The rebels captured power and installed al Gharur a Lakhmid prince as their ruler Al Gharur was a descendant of the Arab kings of Hirah, and was a bitter enemy of Islam. He was crowned as the king of Bahrain and he took the pledge to fight against Islam. He brought pressure on Jarud and his people to denounce Islam. but they remained steadfast in their faith Thereupon the Bahrain forces led an attack against the Muslims. The Muslims of the Banu Abdul Qais shut themselves in the fort of Jarasi, and the non-Muslims pressed the siege with considerable vehemence.