The remarks by General Hassan Firouzabadi -- a close ally of supreme leader Ayatollah Ali Khamenei, who has yet to comment on the agreement -- were published today on the Revolutionary Guards' sepanews.Com website.
Firouzabadi congratulated the Iranian leader on the "success of the team of Iranian negotiators and thanked the president" Hassan Rouhani and officials involved led by Foreign Minister Mohammad Javad Zarif.
Opinions in Iran have been split on the agreement since it was reached in the Swiss city of Lausanne on Thursday.
"There is no reason to party," ultra-conservative lawmaker Hamid Ressaie said today as the Iranian parliament resumed its work.
More From This Section
Speaker Ali Larijani, a conservative, described as "positive" the framework agreement, according to a report by ISNA news agency, as other members cautiously welcomed the deal.
Zarif asked the sceptics to be patient.
"Criticism is useful, but we are in the middle of negotiations and it is not good to expose all the details," he told state television in an interview aired last night.