One who enters with the intention of Maghrib behind an imam who is praying 'Isha'

Question:
And who told you that Allah informed you? If he is informed, he remains with the congregation in the 'Isha' prayer, even though he has not prayed Maghrib, thinking that it is the Maghrib prayer. What does he do?

Answer:
If he enters with the intention of Maghrib, if he enters with the intention of Maghrib and the imam is praying 'Isha', when the imam stands for the fourth rak'ah, he sits down. He sits down and recites the tashahhud, and if he wishes, he says the taslim, and if he wishes, he waits for the imam until he says the taslim and says it with him. But he does not follow in the fourth rak'ah; it is not permissible for him to follow. He remains with his intention, and his intention is for Maghrib, so it remains with his intention, but he does not stand for the fourth. Yes. Yes.
There is no harm, there is no harm, but that he follows them in the fourth, yes. And validity. Yes. It is easy, meaning. This is not permissible. They occupy themselves with the Qur'an and swear oaths or laugh or. This is not permissible. They recite the recitation and talk, whereas they are reading the Qur'an and they are chattering and talking and laughing and joking; this is not permissible.