From "Buffy the Vampire Slayer: Selfless (#7.5)"
I don't care about Halfrek now. I've got plenty of girls. Plenty of vengeance demons. There will always be vengeance demons in this world and others. But not you, Anya. You're out! Your insecurity with vengeance has just cost your powers and immortality... again. But congratulations anyway. Your wish is granted. The lives of those frat boys are now restored.
You should have killed me.
] Oh, I wouldn't worry about that. "From beneath you, it devours." Be patient. All good things in time.
[D'Hoffryn teleports away