Mukhtasar Bukhari (Abridged) 602 — How the Prophet prayed at night

Umm al-Mu'mineen Aisha Siddiqa (may Allah be pleased with her) says that the Prophet Muhammad (peace and blessings be upon him) used to pray thirteen rak'ahs at night; among them were the Witr and the two (Sunnah) rak'ahs of Fajr.