Hashshashin

Assassins (Persian: حشاشين Ḥashshāshīn, Modern Turkish: Haşhaşiler, also Hashishin, Hassassin, or Hashashiyyin) is a misnomer for the Nizari Ismailis applied abusively to them by the Mustali Ismailis during the fall of the decaying Ismaili Fatimid Empire when the two streams separated from each other. In 1122 the Mustalian dynasty Fatimid caliph al-Amir referred to the Nizaris separated from them and "now firmly established in Persia and Syria", abusively as the hashishiyya "without any explanation" and "without actually accusing them of using hashish, a product of hemp".