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

“I see, beyond all seas and star,
The gates of hell, the paths of death
Open: unclasp the surly bars
Before the voice of him that saith:
“I will!” Droop lower to my knees!
Sink gently to the leopard’s skin!1” [via]

Crowley note on this quote: 1. An actual rug: not a symbol.