Is it valid to recite the Mu'awwidhat and al-Ikhlas in the rak'ah of the shaf'?

Question:
If I am praying the shaf' and the witr, and in the last rak'ah of the shaf' I forgot and recited Qul huwa Allahu Ahad (Say: He is Allah, the One), Qul a'udhu bi Rabb al-Falaq (Say: I seek refuge with the Lord of the Daybreak), and thinking that I was in the rak'ah of the witr, is there anything required of me?

Answer:
There is nothing wrong with reciting whatever is easy for you of the Qur'an in the shaf' or in the witr, but it is better to recite in the first rak'ah of the shaf', and Qul ya ayyuha al-kafirun (Say: O you disbelievers) in the second rak'ah, and in the third rak'ah, which is the witr, you recite Surat al-Ikhlas, Qul huwa Allahu Ahad (Say: He is Allah, the One). This is what is best. And if you recite in these three rak'ahs other than these surahs, whatever is easy for you of the Qur'an, there is nothing wrong with that. Yes.