The first mission was sent to Heraclius. When the Muslim envoy, Dihyah Kalbi, reached Palestine, he was informed that the Emperor was celebrating his victory over the Persians by paying a visit to Jerusalem - the cradle of his faith; and thus it was here that the Prophet's letter was delivered to him. The Muslim envoy was received amidst numerous ceremonies. He delivered the following introductory speech before presenting him the letter;
"O Caesar of Rome the one who has sent me as an envoy to you is better than yourself and the Exalted Allah Who has sent him to us as Prophet is the Greatest of Alt. So listen to me with full attention and give an earnest reply. If you do not pay full heed you may not be able to catch its meaning and if your answer does not come out of sincere heart, it will not be just. O King you are well aware of the fact that Jesus, the son of Mary, offered prayers."
The King replied in the affirmative.
The ambassador of the Holy Prophet Salallaho Alaihi Wasallam continued his introductory speech and said, "Then I invite you." said Dihyah Kalbi. "to that Great Allah to Whom Jesus offered his prayers, prostrated himself and Who shaped him in the womb of Mary and Who created the heavens and the earth. Then I invite yon to that un-lettered Prophet whose advent has been foretold by Moses and Jesus and you have a complete knowledge of all these facts. If you accept the message preached by him you shall get Immense reward in this world and the world to come. But in case you reject it, you shall be denied of them. Believe me, there is one Great Master Who punishes the disbelievers and changes their fortunes.

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Brief Biography of the Holy Prophet (Salallaho Alaihi Wasallam)
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