The Teaching of Jacob, Didaskalia Jakobou; Ethiopic Sargis d'Aberga is a 7th century Greek Christian anti-Jewish polemical tract set in Carthage in 634 but written in Palestine sometime between 634 and 640. It supposedly records a July 13, 634 discussion between a Jewish forced convert to Christianity, Jacob, and some Jews about the condition of the Byzantine Empire in light of the recent Arab conquests, and how they should proceed as he had done, and convert to Christianity.
The text provides one of the earliest external accounts of Islam, presenting a significantly different Islamic historiography than found in traditional Islamic texts. It also shows Jacob comparing the Byzantine Empire to the fourth beast of the prophecy of Daniel from Christian eschatology. Although not unfamiliar imagery, it is part of a series of Byzantine literature, from the early stages of the Islamic religion, of trying to reconcile Islam with the apocalyptic vision. Further examples of this are contained in the pseudo-Athanasian's Quaestiones ad Antiochum ducem, and the Quaestiones et responsiones attributed to Anastasius of Sinai.
It records a prophet in Arabia during the birth time of Islamic tradition proclaiming the advent of a Jewish Messiah. The document contradicts the notion in Islamic tradition that the prophet was dead at the time of the conquest of Palestine but agrees with some traditions of other peoples of the time.
This is an extract of the document called Doctrina Jacobi Nuper Baptizati
When the candidatus was killed by the Saracens, I was at Caesarea and I set off by boat to Sykamina. People were saying "the candidatus has been killed," and we Jews were overjoyed. And they were saying that the prophet had appeared, coming with the Saracens, and that he was proclaiming the advent of theanointed one, the Christ who was to come.
I, having arrived at Sykamina, stopped by a certain old man well-versed in scriptures, and I said to him: "What can you tell me about the prophet who has appeared with the Saracens?"
He replied, groaning deeply: "He is false, for the prophets do not come armed with a sword. Truly they are works of anarchy being committed today and I fear that the first Christ to come, whom the Christians worship, was the one sent by God and we instead are preparing to receive the Antichrist. Indeed, Isaiah said that the Jews would retain a perverted and hardened heart until all the earth should be devastated. But you go, master Abraham, and find out about the prophet who has appeared." So I, Abraham, inquired and heard from those who had met him that there was no truth to be found in the so-called prophet, only the shedding of men's blood. He says also that he has the keys of paradise, which is incredible.
Even at that time, which was the time contemporaneous to Muhammad's life, he was already deemed a liar, and a bloodthirsty anti-Christ.
