and Allah said "And proclaim the pilgramage among men; they will come to thee on foot and on every kind of camel. Lean on account of Journeys through deep and distant mountain highways" Surah 22 ~ Al Hajj Part 27
Herculies asked the translator to convey to me the following: "I asked you about his family and your reply was that he belonged to a very noble family.
In fact, all the Messengers come from noble families among their respective peoples. I questioned you whether anybody else among you claimed such a thing; your reply was in the negative.
If the answer had been in the affirmative, I would have thought that this man was following the previous man's statement.
Then I asked you whether anyone of his ancestors was a king. Your reply was in the negative, and if it had been in the affirmative, I would have thought that this man wanted to take back his ancestral kingdom.
I further asked whether he was ever accused of telling lies before he said what he said and your reply was in the negative. So I wondered how a person who does not tell a lie about others could ever tell a lie about Allah.
I then asked you whether the rich people followed him or the poor. You replied that it was the poor who followed him. And, in fact, all the Messengers have been followed by this very class of people.
Then I asked you whether his followers were increasing or decreasing. You replied that they were increasing, and, in fact, this is the way of true faith, till it is complete in all respects.
I further asked you whether there was anybody, who, after embracing his religion, became displeased and discarded his religion. You reply was in the negative, and, in fact this is (the sign of) true faith, when its delight enters the hearts and mixes with them completely.
I asked you whether he had ever betrayed. You replied in the negative, and likewise the Messengers never betray.
Then I asked you what he ordered you to do. You replied that he ordered you to worship Allah and Allah alone and not to worship anything along with Him, and forbade you to worship idols, and ordered you to pray, to speak the truth and to be chaste. If what you have said is true, he will very soon occupy this place underneath my feet and I knew it (from the scriptures) that he was going to appear but I did not know that he would be from you, and if I could reach him definitely, I would go immediately to meet him and if I were with him, I would certainly wash his feet."
Herculies then asked for the letter addressed by Allah's Messenger which had been delivered by Dihya to the Governor of Bosra, who forwarded it to Herculies to read. The contents of the letter were as follows: "In the name of Allah, the Beneficent, the Merciful. (This letter is) from Muhammad, the slave of Allah and His Messenger to Herculies the ruler of Byzantine. Peace be upon him who follows the right path. Furthermore, I invite you to Islam, and if you become a Muslim you will be safe, and Allah will double your reward, and if you reject this invitation of Islam, you will be committing a sin by misguiding your subjects.
And I recite to you Allah's Statement: SAY (O Muhammad): 'O People of the Scripture (Jews & Christians): Come to a word that is just between us and you, that we worship none but Allah, and that we associate no partners with Him and that none of us shall take others as lords besides Allah.' Then, if they turn away, say: 'Bear witness that we are Muslims.' "
Abu Sufyan then added: When Herculies had finished his speech and had read the letter, there was a great hue and cry in the Royal Court . So we turned out of the court. I told my companions that the question of Ibn-Abi-Kabsha (the Prophet Muhammad) had become so prominent that even the King of Bani Al-Asfar (Byzantine) was afraid of him. Then I started to become sure that he (the Prophet) would be the conqueror in the near future till I embraced Islam (Allah guided me to it).
The sub narrator added that Ibn An-Natur was the Governor of Ilya ( Jerusalem ) and Herculies was the head of the Christians of Sham. Ibn An-Natur narrated that once while Herculies was visiting Ilya ( Jerusalem ), he got up in the morning with a sad mood. Some of his priests asked him why he as in that mood. Herculies was a foreteller and an astrologer. He replied: "At night when I looked at the stars, I saw that the leader of those who practice circumcision had appeared (become the conqueror). Who are they who practice circumcision?" The people replied: "Except the Jews, nobody practices circumcision, so you should not be afraid of them (Jews). Just Issue orders to kill very Jew present in the country.'
While they were discussing it, a messenger sent by the king of Ghassan to convey the news of Allah's Messenger to Herculies was brought in. Having heard the news, he (Herculies) ordered the people to go and see whether the messenger of Ghassan was circumcised. The people, after seeing him, told Herculies that he was circumcised. Herculies then asked him about the Arabs. The messenger replied: "Arabs also practice circumcision."