The commander of the Iranian Revolutionary Guard Quds Force, Major General Esmail Qaani, criticised Saudi Arabia over what he said was the kingdom's "subordination to the United States".
Speaking at a closed meeting of the Iranian Parliament, Qaani said: "Saudi Arabia is living under the weight of humiliation as a result of its subordination and association with the United States of America."
The withdrawal of American forces from the region is "imminent", he added, stressing on the "need to avenge" the assassination of his predecessor Qasem Soleimani.
"Given the measures on the resistance forces' agenda, the American forces' retreat from the region is imminent," he said.
Soleimani was killed in a US drone attack near Baghdad International Airport last January.