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

“After a while he took the word again:
‘Go thou then moonwards; on the great salt plain;
So to a pillar. Adamant, alone,
It stands. Around it see them overthrown,
King, earl, and knight. There lie the questing slain,
A thousand years forgotten—bone by bone.
‘No more is spoken—the tradition goes:
‘There learns the seeker what he seeks or knows,’
Thence—none have passed. The desert leagues may keep
Some other secret—some profounder deep
Than this one echoed fear: the desert shows
Its ghastly triumph—silence. There they sleep.
‘There, brave and pure, there, true and strong, they stay
Bleached in the desert, till the solemn day
Of God’s revenge—none knoweth them: they rest
Unburied, unremembered, unconfessed.
What names of strength, of majesty, had they?
What suns are these gone down into the West?” [via]