The leader’s remarks came a few days after a group of 47 Republican senators wrote an open letter to the Iranian government, warning them that any nuclear deal they sign with US President Barack Obama's administration won’t last after Obama leaves office.

Ayatollah Khamenei said under international rules, governments remain committed to their obligations and do not violate them after changes in their administrations, Tasnim reported.

“In the letter, they (the Republican senators) have said they want to teach their rules to Iran,” Imam Khamenei said, “We do not need to learn from them.”

Ayatollah Khamenei in meeting with the chairman and members of the Assembly of Experts

The leader went on to say that in case of a final nuclear deal, the Iranian officials know how to act to prevent the US from “holding the Islamic Republic back”.

Imam Khamenei reiterated his support for the Iranian negotiating team in talks with six world powers over Tehran's nuclear program describing Iranian nuclear negotiators as “reliable and sympathetic individuals who are trying to secure the country's interests.”

Ayatollah Khamenei also expressed concern about the “ploys” of the other side and said whenever the deadline for nuclear talks draws closer, they, particularly the Americans, toughen their tone.

Imam Khamenei Also slammed the US support for the “Islamic State in Iraq and the Levant” (ISIL) terrorist group, saying that the US and its allies have created “the most evil terrorists”, which are ISIL militants.