DUBAI, June 4 (Reuters) - Iran's Supreme Leader Mojtaba Khamenei said in a message on Thursday that Iran's enemies, having been defeated on the battlefield, were now seeking to undermine public resilience and sow internal divisions.

Khamenei called for national unity in the face of those threats and said any action that created pessimism or frustration among the public amounted to helping the enemy.

The message was read on his behalf during ceremonies marking the anniversary of the death of the Islamic Republic's founder, Ruhollah Khomeini, as well as a major Shi'ite holiday.

(Reporting by Dubai Newsroom; Editing by Alex Richardson)