Sunan Ibn Majah
1185
Sahih+3

It was narrated that Masruq said:“I asked ‘Aishah about the Witr of the Messenger of Allah (ﷺ). She said: ‘He prayed Witr at every part of the night, at the beginning, in the middle and at the end, when he died (he would perform it) just before dawn.’”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi