Why Don’t We Recite a Surah After Al-Fatiha in the Last Two Rakats?

Why don’t we recite a surah after al-fatiha in the last two rakats?

Worships are commanded in the Holy Qur’an without giving their details. The Prophet Muhammad (saw) determined how to perform all fardh, wajib, and nafl worships. The Prophet (saw) explained and showed the number of rakats in prayers, how and where to perform qiraat, dhikr, tasbih, tahmid, or duas; how many times to perform ruku and sajdah and said, “Pray as you have seen me praying.” (Bukhari, Adhan, 18). So, we have to perform worships just like they are commanded to us.

We need to evaluate the question in this framework. However, it will not make the prayer invalid if one recites a surah after Fatiha in the last two rakats of fardh prayers. According to the opinion accepted in the Hanafi school, sajdah al-sahw is not required in this situation (Ibn Nujaym, al-Bahr, II, 102; Halabi, Saghir, p. 175).

Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS