Narrated And in another narration of al-Bukhari and Muslim, narrated:
"He used to pray ten Rak'at (of prayer), and making it Witr by one Rak'at, and he used to pray the two (Sunnah) Rak'at of Fajr, so that it became thirteen Rak'at."
Allah's Messenger (ﷺ) did not offer more than eleven (voluntary) Rak'at during Ramadan nor during other than Ramadan. He offered four Rak'at - Do not ask about their beauty and length! (It is beyond description or imitation]. Again he would pray four Rak'at - Do not ask about their beauty and length! . Then he would pray three (Rak'at of Witr). 'Aishah (RA) said: "I said, O Allah's Messenger will you sleep before you pray Witr?" He said, "O 'Aishah my eyes sleep, but my heart does not sleep."