Is it authentically reported to

A: According to the Sunnah, whoever listens to Iqamah should repeat after the Mu'adhin, for it is a second Adhan. Therefore, you should respond, as one responds to Adhan. When the Mu'adhin says, "Hayya ‘ala Al-Salah, Hayya ‘ala Al-falaah (come to prayer, come to prosperity)", the listener should say, "La hawla wala quwwata illa Billah (there is neither might nor power except with Allah). When he says, "Qad qamat il-Salah (Prayer is about to begin)", he should say the same, and he should not say, "Aqamaha Allahu wa adamaha (May Allah keep it established forever). This is because the Hadith concerning that is ranked as Da`if (weak). It is authentically reported that the Messenger of Allah (peace be upon him) said, When you hear the Mu'adhin, repeat what he says (Part No. 6; Page No. 90) This includes both the Adhan and the Iqamah, for both are called Adhan. Then, a person should invoke Allah's peace and blessings upon the Prophet (peace be upon him) after the Mu'adhin says, "La ilaha illa-Allah (None has the right to be worshipped except Allah)" in addition to saying,"Allahumma rabba hadhihi ad-Da‘wati at-Tammah, was-Salatil-Qa’imah, etc., (Oh Allah, the Lord of this perfect call and of this prayer, which is going to be established...)" as said after the Adhan. We do not know of any authentic evidence to suggest that it is recommended to say any other supplication between the end of the Iqamah and Takbirat-ul-Ihram (saying: "Allahu Akbar [Allah is the Greatest]" upon starting Prayer), apart from what has been mentioned.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.