Abdullah ibn abbas hadithi
Abu Sufyan bin Harb informed me that Heraclius had sent a messenger to him while he had been accompanying a caravan from Quraish. Heraclius called them in the court and he had all the senior Roman dignitaries around him. He called for his translator who, translating Heraclius's question said to them, "Who amongst you is closely related to that man who claims to be a Prophet?
Had I not been afraid of my companions labeling me a liar, I would not have spoken the truth about the Prophet. The first question he asked me about him was: 'What is his family status amongst you? We are at truce with him but we do not know what he will do in it.
40 hadith in arabic
Heraclius asked, 'Have you ever had a war with him? He orders us to pray, to speak the truth, to be chaste and to keep good relations with our Kith and kin. In fact all the Apostles come from noble families amongst their respective peoples. I questioned you whether anybody else amongst 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.