He made the remarks in a meeting with thousands of people from the city of Najafabad at the Imam Khomeini Mosque downtown Tehran on Wednesday morning.
When enemy witness the fact that, 37 years of pressures, oppressive sanctions and hostile propaganda have not prevented people to pledge their allegiance to the Islamic system, grandeur of revolution will shiver down its spine, Ayatollah Khamenei said.
He added that the election time in Iran is the time of national mobilization in which nation stands against enemy and challenges it.
Najafabad is located in central Iranian province of Isfahan. The meeting was held on the verge of Majlis and Assembly of Experts elections slated for February 26.