Tatian (120 – 180) produced the Diatessaron as an early Gospel harmony, which ended up being widely used in certain Syriac-speaking churches, oddly enough apparently to the displacement (or substitution) of the actual gospels.   Tatian’s Diatessaron, Section II (as preserved in an Arabic translation) states: And when the days of their purification according to the law of Moses were completed, they took him…