The Nameless Quest in The Gate of the Sanctuary from The Temple of the Holy Ghost (Collected Works, Vol I) by Aleister Crowley.

“I must have listened to the voice of hell.
The earthly horror wove its serpent spell
Against the Beauty of the World: I heard
Desolate voices cry the doleful word
“Unready!” All the soul invisible
Of that vast desert echoed, and concurred.
The voices died in mystery away.” [via]