Sayyida Aisha (may Allah be pleased with her) said: The Messenger of Allah (peace and blessings be upon him) performed Witr in every part of the night, and towards the end, his Witr would be close to the morning.
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1626
Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings be upon him) was asked about Witr, so he (peace and blessings be upon him) said: "Pray Witr before Fajr."
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1627