From Was Wiping Israel Off the Map a Misquote?:
Some academics and policymakers bend over backwards to convince themselves and others that Iranian President Ahmadinejad does not mean what he says. Rep. Dennis Kucinich (D-Ohio) argued that the proper translation of Ahmadinejad’s quotes is the subject of debate and that translations used were either misquoted or out of context. It’s a line which originated with Juan Cole, a University of Michigan professor, who wrote: “This idiom does not exist in Persian, and that what Ahmadinejad actually said was, ‘This occupation regime over Jerusalem must vanish from the page of time.'” But here, the Islamic Republic provides its own clarification. In its official translations, it headlined Ahmadinejad’s call to “wipe Israel off the map.”
See Ahmadinejad: Israel Must Be Wiped Off the Map (IRIB-Islamic Republic of Iran Broadcasting)