context: The Shiffin War (Arabic: وقعة صفين) (May-July 657 AD) took place during the time of the great slander or the first civil war of Muslims with the main battle taking place from July 26-28. This battle took place between the two camps, Muawiyah bin Abu Sufyan and Ali bin Abi Talib on the banks of the Furat River which is now located in Syria (Sham) on the 1st Shafar of the 37 Hijri year.
question: What year did the Battle of Shiffin occur?
answers.text: 37 Hijri