What was in the letter the Messenger (saw) sent to Haudha the ruler of Yamama (in Saudi Arabia)?

The letter sent to Haudha bin Ali ran as follows: "In the Name of Allah, the Most Beneficent, the Most Merciful. From Muhammad, Messenger of Allah to Haudha bin Ali. Peace be upon him who follows true guidance. Be informed that mydeen shall prevail everywhere. You should accept Islam, and whatever under your command shall remain yours." The envoy chosen was Sulait bin Amr al-Amiri, who after communicating his message, carried back the following reply to the Messenger: "The deen to which you invite me, is very good. I am a famous orator and poet; the Arabs highly respect me and I am of account among them. If you include me in your government, I am prepared to follow you." The Messenger did not accept Haudha’s demand. He (saw) usually turned down such peremptory tone, and would say that the whole matter was in the Hand of Allah, who gave his land to whoever He desired. Gabriel later came with the revelation that Haudha had died. The Messenger (saw), in the context of his comment on this news, said: "Yamama is bound to give rise to a liar who will arrogate Messengerhood to himself but he will subsequently be killed." In reply to a question relating to the identity of the killer, the Messenger said "It is one of you, followers of Islam."(Za’ad al-Ma’ad) A Christian scholar who was there advised Haudha to accept Islam and told him the Arab Messenger would not have deprived him of his. He had informed his that Isa (as) had given the good news in the Bible, a Messenger would come. Haudha, however, could not overcome the fear of losing his territories and did not accept Islam. (al-Waqidi, al-Maghazi)