“If one must drink, then let one drink thrice a month, for more is bad. If one gets drunk twice a month, it is better; if one gets drunk once a month, that is better still; and if one doesn't drink at all, that is the best of all.”
As given in Rashid al-Din's Compendium of Chronicles (Jami' al-tawarikh) ( https://en.wikipedia.org/wiki/Jami%27_al-tawarikh) (Can find a translated version on google books: http://books.google.com/books?id=d2SWstj6j3AC&lpg=PA142&ots=8Tn8g77BgR&dq=genghis%20khan%20and%20drinking&pg=PA142#v=onepage&q=genghis%20khan%20and%20drinking&f=false)
Help us to complete the source, original and additional information
Genghis Khan 5
founder and first emperor of the Mongol Empire 1162–1227Related quotes

“Life is a drink and you get drunk when you're young.”
When You're Young (1979)

“Buy Sam a drink and get his dog one, too!”
Quoted in Keith Barnes, "Lange's inimitable style makes him a broadcast legend", Tribune-Review (2008-01-20)

Grace Is Gone
Busted Stuff (2002)

“You can't produce a baby in one month by getting nine women pregnant.”

Morality
The Note-Books of Samuel Butler (1912), Part II - Elementary Morality
“But my lord, Yvonne, surely you know by this time I can’t get drunk however much I drink.”
Source: Under the Volcano (1947), Ch. III (p. 85)