Where does the Buddha say 'you will be punished by your anger'? I've heard this quote attributed to the Buddha


  You will not be punished for your anger, you will be punished by your
  anger


Does anyone know where the quote comes from? Also the The notion of punishment seems a bit non standard to me. Does anyone know the orginal term (Pali etc...) translated here as punishment and if this is an accurate translation. I do like the quote though hence the question.
The fakebuddhaquotes web site attributes it as follows:

Going back to 1993, we hit pay dirt! In To Love Is to Know Me: The Bhagavad Gita for Daily Living (Volume 3), author Eknath Easwaran says the following:

Even more intriguing to me is the karma of our health. Again, let me illustrate one or two kinds of connection. For one, the Buddha says that we are not punished for our anger, we are punished by our anger. In other words, anger is its own karma.

Note the absence of quotation marks. Eknath is not quoting the Buddha, but paraphrasing his teachings on anger and karma.