The ruling on reciting a surah after al-Fatihah in the last two rak'ahs

The questioner:
The questioner says: The imam of our neighborhood mosque delays after reciting al-Fatihah in the last two rak'ahs of the four-rak'ah prayers, such as 'Asr, 'Isha', and Zuhr. Is it permissible for me to recite a surah after al-Fatihah?

The Shaykh:
Yes, we say.

The questioner:
The questioner says: The imam of our neighborhood mosque delays after reciting al-Fatihah in the last two rak'ahs of the four-rak'ah prayers, such as 'Asr, 'Isha', and Zuhr. Is it permissible for me to recite a surah after al-Fatihah so that I do not fall into waswas (whispers of doubt)?

The Shaykh:
He recites some of it, what? He says.

The questioner:
The imam delays, O Shaykh.

The Shaykh:
Yes, but is it permissible, and what does that mean?

The questioner:
Recite a surah after al-Fatihah.

The Shaykh:
Surah.

The questioner:
A surah.

The Shaykh:
A surah after al-Fatihah, in the first two rak'ahs, yes, you recite a surah after al-Fatihah, or part of a surah. As for the last two rak'ahs, you restrict yourself to al-Fatihah only. Yes. May Allah reward you.