´Zuhair narrated from Abu Ishaq, from Sa'eed bin Jubair, :` Ibn Abbas used to pray witr with three (units) with (the Surahs): "Glorify the Name of Your Lord, the Most High" (Surah Al-A'la), "Say: O You disbelievers" (Surah Al-Kafirun), and "Say: He is Allah, (the) One" (Surah Al-Ikhlas).
Hadith Referenceسنن نسائي / كتاب قيام الليل وتطوع النهار / 1704
Hadith Gradingالألبانی:ضعيف الإسناد | زبیر علی زئی:حسن
1704. Commentary: The difference between the two is that in the first narration, three witr are mentioned as the action of the Messenger of Allah (sallallahu alayhi wa sallam), while in the second hadith, it is the personal action of Ibn Abbas (radi Allahu anhuma). By "difference," this is what the author (rahimahullah) intends. And Allah knows best.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 1704