Jayfar bin Al Julanda. During the lifetime of the Holy Prophet, Uman bordering on the Persian Gulf was under Persian influence. lt. was ruled by Jayfar bin Al Julanda who owed allegiance to Persia. When the Holy Prophet sent letters inviting the various rulers to Islam, a letter was addressed to Jayfar as well. As the Persian power was on the decline, Jayfar stood in need of some outside support to bolster up his rule. He responded favorably to the invitation of the Holy Prophet. He said that he was inclined to accept Islam, but the difficulty was that his people were not likely to agree to the payment of Zakat to Madina. The Holy Prophet assured him that if he and his people became Muslims, the amount realized from Zakat could be distributed among the poor and the destitute in Uman itself. Thereupon Jayfar became a Muslim, and under his influence most of his people were also converted to Islam. The Holy Prophet appointed Amr bin Al Aas as the Muslim Resident in Uman.

Laquit bin Malik. After the death of the Holy Prophet, like other parts of Arabia Uman also fell a prey to chaos and anarchy. A false prophet Laquit bin Malik came into prominence. He belonged to the Azdi tribe, which was very numerous. The Azdi felt elated at having a prophet of their own. They apostatized from Islam, and accepted the new creed. Laquit exempted his followers from the disciplines of fasting, prayers, and Zakat. He sanctioned adultery as well as the use of wine. He claimed that he was the recipient of divine revelations. Jayfar remained faithful to Islam, but he lost his hold on the people of Uman most of whom accepted the new creed. Laquit gained in strength, overthrew Jayfar and captured political power. Jayfar and the few people who remained true to Islam had to seek refuge in the hill. Laquit declared himself as the king of Uman. He assumed the title of "Zul Taj"-the crowned head. He established his capital at Daba.

Muslim campaign against Uman and Mahrah. With the change in the affairs of Uman, the Muslim Resident Amr b Al Aas left Uman for Madina. Back in Madina, Amr gave a detailed report of the developments in Uman to the Caliph. Abu Bakr dispatched a force under Hudhaifah b Muhsan to undertake operations in Uman. The wave of apostasy overwhelmed the neighboring state of Mahrah as well. The Caliph sent another force under the command of 'Urfajah to operate in Mahrah. Both the forces under Hudhaifah and 'Urfajah were required to collaborate. The operations were required to be commenced from Uman. The instructions of Abu Bakr were that it there was a battle in Uman, Hudaifah was to lead the combined forces, and if the operations were undertaken in Mahrah, 'Urfajah was to hold the Command. When 'Ikramah met a reverse at Yamama, he was required not to return to Madina, but to proceed with his men to Uman and Mahrah. All the three forces of Hudhaifah, 'Urfajah and 'Ikramah were directed to act in concert.