“Stop telling God what to do with his dice.”

Source: The Born-Einstein Letters 1916-55

Imaginary Magnitude" (1981), "Lecture XLIII", tr. Marc E. Heine (1984)

Journal of Discourses 12:262 (Aug. 9, 1868)
1860s

By The River Piedra I Sat Down and Wept (1994)
Context: The gods throw the dice, and they don't ask whether we want to be in the game or not. They don't care if when you go, you leave behind a lover, a home, a career, or a dream. The gods don't care whether you have it all, whether it seems that your every desire can be met through hard work and persistence. The gods don't want to know about your plans and your hopes. Somewhere they're throwing the dice — and you are chosen. From then on, winning or losing is only a question of luck.
The gods throw the dice, freeing love from its cage. And love can create or destroy — depending on the direction of the wind when it is set free.

Bad (1987)

During the same 1994 exchange with Penrose as the previous quote, transcribed in The Nature of Space and Time (1996) by Stephen Hawking and Roger Penrose, p. 26 http://books.google.com/books?id=LstaQTXP65cC&lpg=PA26&dq=hawking%20%22where%20they%20can't%20be%20seen%22&pg=PA26#v=onepage&q=&f=false and also in "The Nature of Space and Time" (online text) http://arxiv.org/abs/hep-th/9409195
Unsourced variants: Not only does God play dice with the Universe; he sometimes casts them where they can't be seen.
Not only does God play dice, but... he sometimes throws them where they cannot be seen.
Variant: So Einstein was wrong when he said "God does not play dice". Consideration of black holes suggests, not only that God does play dice, but that He sometimes confuses us by throwing them where they can't be seen.

Referencing Albert Einstein's famous remark that "God does not play dice with the universe", this is attributed to Erdős in "Mathematics : Homage to an Itinerant Master" by D. Mackenzie, in Science 275:759 (1997), but has also been stated to be a comment originating in a talk given by Carl Pomerance on the Erdős-Kac theorem, in San Diego in January 1997, a few months after Erdős's death. Confirmation of this by Pomerance is reported in a statement posted to the School of Engineering, Computer Science & Mathematics, University of Exeter http://empslocal.ex.ac.uk/people/staff/mrwatkin//kac-pomerance.txt, where he states it was a paraphrase of something he imagined Erdős and Mark Kac might have said, and presented in a slide-show, which subsequently became reported in a newspaper as a genuine quote of Erdős the next day. In his slide show he had them both reply to Einstein's assertion: "Maybe so, but something is going on with the primes."
Misattributed

Source: My Utmost for His Highest: Selections for the Year

Breathe
Breathe (2006)