Is there a specific dhikr when the mu'adhdhin says, "I bear witness that Muhammad is the Messenger of Allah"?

Question:
Honorable Shaykh, the questioner asks: Is there a specific dhikr when the mu'adhdhin says, "I bear witness that Muhammad is the Messenger of Allah"?

Answer:
The dhikr is to say the same thing: "I bear witness that Muhammad is the Messenger of Allah," just as the mu'adhdhin says. That is complete. They mentioned the issue of tarji', which is to say "I bear witness that there is no god but Allah" quietly, then raise one's voice with it, then say "I bear witness that Muhammad is the Messenger of Allah" quietly, then raise one's voice with it. This is called tarji'.
This is reported in the hadith of Abu Mazhura in Makkah, and Bilal did not do it in Madinah with the Prophet (peace and blessings be upon him). Some scholars hold that tarji' is a recommended practice (sunnah), while others say no, it is specific to Abu Mazhura, because the Prophet (peace and blessings be upon him) did not do it in Makkah, nor did he order it in Makkah, and he did not do it in Madinah, nor did he order it in Madinah. Yes.