A man sat for the first tashahhud, recited al-Fatihah by mistake, then recited the tashahhud, but did not perform the prostration for forgetfulness. What is the ruling on his prayer?

Question:
A man says: I sat for the first tashahhud, and instead of reciting the tashahhud, I recited al-Fatihah by mistake. Then I recited the tashahhud, but I did not perform the prostration for forgetfulness, and I did not remember until some time had passed. What is the ruling on my prayer? Do I have to repeat it? Or what should I do? May Allah reward you with good.

Answer:
His prayer is valid. As long as he performed the first tashahhud after he remembered, he has fulfilled what is obligatory upon him. His recitation of al-Fatihah is considered a mistake and forgetfulness. It is recommended that he perform the prostration for forgetfulness for that, either after the taslim or before the taslim. After the taslim, provided the interval was not long. However, if the interval was long, he owes nothing, and praise be to Allah.