It was
narrated from Ibn ‘Abbas that the Messenger of Allah (ﷺ)
used to
perform Witr and recite:
“Glorify the Name of your Lord the
Most
High,” [Al-A’la (87)] “Say: O you disbelievers!” [Al-Kafirun
(109)] and ‘Say: Allah is One.”. [Al-Ikhlas (112)]
Another chain with similar wording.