In the Syriac literature, an ÿeltà(plural ÿellÃÂtÃÂ) is a work explaining the reasons behind feast days, aspects of the liturgy or some other part of church tradition. It is a distinctive literary genre of the Church of the East and is strongly associated with the schools, such as the School of Nisibis and the School of Seleucia-Ctesiphon. It flourished between the 6th and 8th centuries.
The word ÿeltàis Syriac for "cause" or "explanation". The genre may be called "cause literature" in English.
Most surviving examples of the genre are derived from a single 16th-century manuscript collection called "Explanations of the Feasts of the Economy". All of these date to the 6th century:
Outside of this collection are the ÿeltàon the Trisagion by the 6th-century Patriarch Ishoyahb I and the Cause of the Foundation of the Schools by a certain Barhadbshabba, either Barhadbshabba of Hulwan or Barhadbshabba Arbaya.
Many ÿellÃÂtàwere written that no longer survive. They are known only through the bibliography compiled in the early 14th century by Abdisho bar Brikha. These include:
Abdisho also records that Shallita of Reshaina in the 8th century, the Patriarch Isho bar Nun in the 9th and the Patriarch Abdisho I in the 10th wrote ÿellÃÂtÃÂ, without specifying on what topics.