The ruling on the prayer of the ma'mum if he does not recite al-Fatihah

Question:
In a hadith of the Messenger (peace and blessings be upon him): or as he (peace and blessings be upon him) said. So, is the prayer of the ma'mum invalid if he does not recite al-Fatihah, especially in the Fajr prayer? May Allah reward you with good.

Answer:
It is obligatory for everyone to recite al-Fatihah, based on the saying of the Prophet (peace and blessings be upon him): However, if the ma'mum misses the standing and arrives while the imam is bowing, his rak'ah is sufficient, praise be to Allah. Or if he forgets the recitation, or is ignorant of the ruling, his prayer is valid due to the legal excuse. This is because the Messenger (peace and blessings be upon him) excused Abu Bakrah when he arrived while the imam was bowing. Abu Bakrah bowed outside the row, then entered the row, and the Prophet (peace and blessings be upon him) did not order him to make up the rak'ah. Rather, he said to him: , meaning: Do not return to bowing outside the row, but be patient until you enter the row. And he did not order him to make up the rak'ah. This indicates that one who arrives while the imam is bowing, or is bowing with him, is excused if he does not recite, because there is no time left for it. Likewise, if he is ignorant of the legal ruling, or forgets to recite it, his prayer is valid.
As for the imam, he must recite it, and it is not dropped from him. Likewise, the one praying alone must recite it. And if he forgets it in any of the rak'ahs, he performs a rak'ah in place of the rak'ah in which he forgot al-Fatihah, and prostrates for forgetfulness. Yes.

The presenter : May Allah reward you with good, and may He do you good.