Examples Ive read: Most Lovecraft works.
I have no mouth and I must scream.
The older Magic: The Gathering lore, specifically the story of Yawgmoth, Father of Machines, and the Phyrexian storylines.
If that doesn't help, maybe try this:
What books could have this line in it?
"I saw the face of our god, and it was ugly."
by ThaCrisp