And I bear witness that none has the right to be worshipped but Allah alone, Who has no partner, and that Muḥammad is His slave and His Messenger. I am pleased with Allah as my Lord, with Muḥammad as my Messenger and with Islam as my religion. [To be recited in Arabic after the Mu`aththin’s Tashahhud or the words of affirmation of Faith]

References

[Sahih Muslim - 386]

Notes

Recite this du'a after the muazzen says the shahadatain.