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

“The plain is covered with a many dead.
Glisten white bone and salt-encrusted head,
Glazed eye imagined, of a crystal built.
And see! dark patches, as of murder spilt.
Ugh! ‘So thy fellows of the quest are sped!
Thou shall be with them: onward, if thou wilt!’
So was the chilling whisper at my side,
Or in my brain.” [via]