What is the ruling if I prayed in congregation a prayer in which the recitation is silent and I forgot to recite al-Fatihah?

The questioner : And no two prostrations of forgetfulness after the imam has finished the taslim.

The Shaykh : I did not understand what you said.

The questioner : I want to pray, for example, I prayed in congregation, so the prayer is not one of loud recitation, and I forgot to recite al-Fatihah.

The Shaykh : A follower?

The questioner : Yes.

The Shaykh : A follower?

The questioner : I am behind the imam.

The Shaykh : Behind the imam and you forgot to recite al-Fatihah.

The questioner : And I forgot it, so after he finished and the imam was saying "Peace be upon you," I... two prostrations, right, or the whole rak'ah?

The Shaykh : Do you not answer? The whole rak'ah?

The questioner : The whole thing. May Allah reward you with good.

The Shaykh : And beware of that.

The questioner : ... .

The Shaykh : There is nothing.

The questioner : There is nothing.

The Shaykh : There is nothing, and praise be to Allah.

The questioner: Peace be upon you.