Sayyiduna Sha'bi (may Allah have mercy on him) narrates that Ibn Baqilah, who was a resident of Hira, read out a letter to me. The size of the letter was equal to a palm. It was written in it: "In the name of Allah, the Most Gracious, the Most Merciful. From Khalid bin Walid (may Allah be pleased with him) to the chiefs of the people of Persia. Peace be upon him who follows guidance. To proceed! All praise is for Allah who has taken away your kingdom, weakened your strategies, scattered your group, and broken your service. So, accept protection from me and pay the jizya, and present such-and-such things as security. Otherwise, by Allah, besides whom there is no deity, I will attack you with such people who love death just as you love life."