Saeed bin ‘Abdur-Rahman bin Abza narrated from his father, that Ubayy bin Ka’b said: “The Messenger of Allah صلی اللہ علیہ وآلہ وسلم used to recite in Witr: “Glorify the Name of your Lord, the Most High;” and: ‘Say: you disbelievers!;’ and: ‘Say:
He is Allah, (the) One.’ And when he said the Salam, he would say: Subhanal-Malikil-QuddIss (Gloiy be to the Sovereign, the Most Holy) three times.” (Sahih)