Summary This generation is from the years 670 AD to 690 AD. According to our count, this generation is the 81st generation associated with Psalm 81. It is in this Psalm 81 that we therefore find an illustration of the facts of this generation. Since Caliph Ali had been assassinated in 661, Muawiya reigned supreme; … Lire la suite de 670 AD to 690 AD, Psalm 81: Greek Fire.