Question: Is the third testimony a part of Adhan and Iqamah?
Answer: Ash hadu anna Amiral Mu'minina 'Aliyyan Waliyyullah ( I testify that the Commander of the faithful, Imam Ali (AS) is the vicegerent of Allah) is not a part of Adhan and Iqamah, but it is good to say it after reciting Ash hadu anna Muhammadan Rasulul lah with the intention (Niyyat) of Qurbat (seeking nearness to Allah).
Ayatollah Al-Sayyid Ali Al-Husseini Al-Sistani