Which school of fiqh recommends this recitation in witr prayer?

A few years ago i have been told that it is recommended to recite after the fatiha in shaf'a and witr or 3 rak'a witr prayer the following surahs: - 1st raka'a of shaf'a: surah al-A'la (87 ). - 2nd raka'a of shaf'a: surah al-Kafiroon (109 ). - In the only rak'a of witr: surah al-Ikhlass (112 ), then al-Falaq (113 ) followed by an-Nass (114 ). Lately i checked sunnah.com about a reference for that but couldn't find any while i found hadith like this one in Jami' at-Tirmidhi or sunan an-Nasaai , where surah al-Falaq and an-Nass ar not quoted at all. Even on fatwa sites I couldn't find a backup or recommendation like this. This is why I'd like to know how this deviation from the sunnah can be explained and what is the source or what madhab/sect is following or recommending the practice described above?