Mahmad's Baptists A Sabi (Baptist) did present their the faith to Heraclius as the Hadiths claim but there was no leader by the name of Muhammad to be heard of according to mentioned the Byzantine version of the story. In fact, the belief presented was Monophysitsm and the presenter was called Paulic (its adherents came to be called Paulician by the Byzantines ever since).
"When the Emperor Heraclius in the course of the war which he began about 619, came to Theodosiopolis (Erzeroum) in Armenia (about 622), a Monophysite named Paul, a leader of the Acephali, made a speech before him in favour of his heresy. The emperor refuted him with theological arguments, and incidentally made use of the expression "one operation" of Christ."