Is this Sirius Black quote in the book or just the film?

It's a movie quote. He doesn't say this in the book. He does say "The world isn't split into good people and Death Eaters" but he says it when ping off the possiblity of Umbridge being a Death Eater. I'm very confident in my answer because I did an electronic search of the whole book, and this doesn't come up anywhere. I broke this down into sentences in case maybe you botched a piece of it, but it's still not in there.