Hazrat Jabir narrates that I asked Hazrat Amir, "If a man begins to give the adhan but then says the iqamah, what should he do?" He replied, "He should give the adhan again." Hazrat Sufyan said, "He should consider it as the adhan and say the iqamah."

Ibrahim says that if a person begins to give the adhan but says the iqamah instead, then he should give the adhan again.