the word “assasin” dereives from the Arabic for “Hash”.
I discovered that fact a few years ago whilst reading the excellent “Hashish by Robert Connell Clarke”
Hassan al-Sabbah was a charismatic leader in the 12th century, a brilliant mathematician, a devoted religious scholar, an awesomely diabolical mastermind, and the founder and first Grand Master of one of history’s deadliest and most lethal mystery cults – the Hashashin, the secret Order of Assassins.
Recruits came to Alamut to study the mysterious ways of the Isma’ili, and Hassan housed them in small, modest, windowless apartments deep beneath the mountain. They stayed there for a while, studying shit and learning, until one day a servant arrived with a magical potion for the initiate to drink which consisted of Hashish and a combination of psychoactive herbs that induced vivid hallucinations.