It is derived from the Latin Vulgate, specifically Mark 8:33, where Jesus rebukes Saint Peter with the words “vade retro me Satana” ("get behind me, Satan").
Crux sacra sit mihi lux / Non draco sit mihi dux Vade retro satana / Nunquam suade mihi vana Sunt mala quae libas / Ipse venena bibas It is derived from the Latin Vulgate, specifically
This is a comprehensive feature on the history and cultural impact of the phrase "Vade Retro Satana." The Saint Benedict Medal
The phrase became a cornerstone of Catholic tradition as part of a Medieval exorcism formula. In 1415, a manuscript was discovered at Metten Abbey in Bavaria that contained the full poetic prayer associated with the phrase: specifically Mark 8:33
"May the Holy Cross be my light / Let not the dragon be my guide / Step back, Satan / Never tempt me with vain things / What you offer me is evil / Drink the poison yourself". The Saint Benedict Medal