Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) used to recite Surah Al-A'la, Surah Al-Kafirun, and Surah Al-Ikhlas in the Witr prayer, and after concluding with salam, he used to recite «سُبْحَانَ الْمَلِكِ الْقُدُّوسِ» three times.