QUESTION OF HERACLIUS, EMPEROR OF ROME H H 327 'What does he (the Prophet,) teach you?' Abu Sufyan replied: 'He teaches us to worship Allah alone and not to associate anything with Him. To abandon what our ancestors said and he commands us to establish the prayer, to tell the truth, to be chaste and to strengthen the ties of kinship.'" R 327 Bukhari and Muslim with a chain up to Abu Sufyan who related that during the course of his meeting with Heraclius the latter asked him this.
327- وعن أَبي سفيان صخر بنِ حرب رضي الله عنه في حديثِهِ الطويل في قِصَّةِ هِرَقْلَ : أنَّ هرقْلَ قَالَ لأبي سُفْيَانَ : فَمَاذَا يَأمُرُكُمْ بِهِ ؟ يَعْنِي النَّبيّ صلى الله عليه وآله وسلم ، قَالَ : قُلْتُ : يقول : "اعْبُدُوا اللهَ وَحْدَهُ ، وَلاَ تُشْرِكُوا بِهِ شَيئاً ، واتْرُكُوا مَا يَقُولُ آبَاؤُكُمْ ، وَيَأمُرُنَا بِالصَّلاةِ ، وَالصّدْقِ ، والعَفَافِ ، والصِّلَةِ" مُتَّفَقٌ عَلَيهِ .