The Imam's Provisions, Part Five: The ma'mum sat down, recited the tashahhud, and said the taslim, but did not wait for the imam. Is his action valid?

The Shaykh:
Yes, yes.

The questioner:
Shaykh, a second question, Shaykh. If the imam adds a fifth rak'ah to a four-rak'ah prayer, do I sit, Shaykh, or do I follow him and say the taslim? Before the imam returns to say the taslim, Shaykh.

The Shaykh:
It is obligatory to wait.

The questioner:
Okay, it happened, Shaykh, and the person said the taslim.

The Shaykh:
What is the reason?

The questioner:
Yes, out of ignorance, Shaykh. He said the imam added a rak'ah, and I thought he was making a mistake, so I said the taslim.

The Shaykh:
Yes. We hope it is corrected, if Allah wills. So, is it obligatory to wait until he says the taslim with you?

The questioner:
It is not permissible for him to say the taslim, Shaykh.

The Shaykh:
What does he do?

The questioner:
He performs the prostration for forgetfulness.

The Shaykh:
Yes, yes, yes, he waits until it happens with him.

The presenter:
Yes, the imam, yes.