Hnanisho' the Exegete was a 7th century catholic priest in Iraq whose writings give witness to the events of his time including the relationship between the Christians and the Jews and the "new folly" "spread by the sword" which was later to become Islam.

References

• Seeing Islam As Others Saw It: A Survey and Evaluation of Christian, Jewish and Zoroastrian Writings on Early Islam (Studies in Late Antiquity and Early Islam) Robert G. Hoyland