were entrusted with the delivery of these letters.
The Prophet Muhammad had a ring made of silver inscribed with the words “Muhammad the messenger of God.” He used to seal his letters with this ring.
These letters, short and simply written, gave the basic message of Islam. Here is the letter which the Prophet wrote to Khusru Parvez, the king of Persia:
“In the name of God, the Merciful, the Beneficent. From Muhammad , God’s messenger, to Khusru, the leader of Persia. Peace be to him who follows right guidance, believes in God and His messenger, and declares that there is no deity save God, the only God, Who has no partners, and that Muhammad is His servant and messenger. I wish to convey to you God’s call, for I am God’s messenger to all mankind, sent with the task of warning all those who are alive that doom will befall those who reject the truth. If you submit to God, you will be safe. If you refuse, you shall bear the responsibility for the Magians (i.e. your people).”
Some of the rulers, like Negus, the ruler of Abyssinia, accepted Islam, while others rejected it, but they accepted the letters graciously and sent presents to the Prophet. Only the Emperor of Iran, Khusru Parvez, tore the Prophet’s message apart in his arrogance. He considered it below his dignity to accept such a letter.