I had gotten up to two, maybe three, packs (of cigarettes) a day. And my lungs were bothering me and I'd had pneumonia two or three times. And I was also smoking pot, and I decided, well, one of them's got to go. And so I took a pack of Chesterfields and took all the Chesterfields out, rolled up 20 big fat ones and put it in there, and I haven't smoked a cigarette since then

NPR Staff (November 18, 2012). "Willie Nelson: Road Rules And Deep Thoughts". NPR.org (National Public Radio). Retrieved on November 18, 2012.

Willie Nelson: Road Rules And Deep Thoughts : NPR