A month ago, I was invited to give Adhaan (Call to prayer) in Fajr in a mosque. Since I had done this only in a small mosque, I was a little nervous, but still did it. A few minutes after finishing, I realised that I had missed out the statement:
الصلوة خير من النوم
(Prayer is better than sleep)
Later, two persons pointed that to me, but none of them asked me to repeat the Adhaan. The remaining prayer went on peacefully.
Similarly, A Mu'addhin may also do mistakes like saying "ﺤﻲﻋﻠﻰﺍﻠﺼﻼﺓ" just once. After all, it is human to make mistakes.
What does a Mu'addhin do when he makes a mistake?
If an Imaam makes a mistake in Salaah, we alert him by saying out loud "Subhanallah". What do we do to point out mistake done by a Mu'addhin?