Wa 'anā 'ash-hadu 'an lā 'ilāha 'illallāhu
waḥdahu lā sharīka lahu
wa 'anna Muḥammadan 'abduhu wa rasūluhu,
raḍītu billāhi rabban,
wa bi Muḥammadin rasūlan
wa bi 'l-islāmi dīnan.
I bear witness that none has the right to be worshipped but Allah
alone, Who has no partner,
and that Muhammad is His slave and His Messenger.
I am pleased with Allah as my Lord,
with Muhammad as my Messenger
and with Islam as my religion.1
[To be recited in Arabic after the mu'adh-dhin's tashahhud or the words of affirmation of Faith] 2
Reference:
1. Muslim 1/290.
2. Ibn Khuzaymah 1/220.
يقول مثل ما يقول المؤذن إلا في (حي على الصلاة ، وحي على الفلاح) فيقول
لا حول ولا قوة إلا بالله.
Repeat what the Mu'adh-dhin says, except for when he says:
Hayya 'alas-Salāh (hasten to the prayer) and Hayya 'alal-Falāh (hasten to salvation). Here you should say:
Lā ḥawla wa lā quwwata 'illā billāh.
There is no might…
Between the call to prayer and the 'Iqamah, you should supplicate Allah for yourself.
Invocation during this time is not rejected.
Reference:
At-Tirmidhi, Abu Dawud, Ahmed. See Irwaa Al-Ghalil 1/262