The Ruling on Repeating Surahs in Prayer

The ruling on repeating surahs in prayer.

As each two rakats are accepted as independent in rawatib prayers with four rakats, (Ibn Abidin, Radd al-Muhtar, II, 456) reciting the surahs recited after Fatiha in the 1st and 2nd rakats again in the 3rd and 4th rakats does not harm the prayer. However, it will be better for those, who know other surahs, to recite them rather than repetition.

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