Sunan an Nasai
1731
Sahih+2

It was narrated from Ibn Abdur-Rahman bin Abza from his father that:The Messenger of Allah (ﷺ) used to recite in Witr: "Glorify the Name of your Lord, the Most High;" and "Say: O you disbelievers!;' and 'Say: He is Allah, (the) One

SahihAbu Ghuddah
SahihAl-Albani