Iran’s Supreme Leader Ayatollah Ali Khamenei said Thursday that his country had delivered a “slap to America’s face” by striking a U.S. air base in Qatar and warned against further attacks in his first public comments since a ceasefire agreement with Israel.

Khamenei’s prerecorded speech that aired on Iranian state television, his first appearance since June 19, was filled with warnings and threats directed toward the United States and Israel, the Islamic Republic’s longtime adversaries.

The 86-year-old, a skilled orator known for his forceful addresses to the country’s more than 90 million people, appeared more tired than he had just a week ago, speaking in a hoarse voice and occasionally stumbling over his words.

The supreme leader downplayed U.S. strikes on three Iranian nuclear sites Sunday using bunker-buster bombs and cruise missiles, saying that U.S. President Donald Trump — who said the attack “completely and fully obliterated” Iran’s nuclear program — had exaggerated its impact.