Allah's Messenger said: "Perform Witr before the morning comes upon you."
Jami` at-Tirmidhi Book 3, Hadith 16
← Previous Hadith the Prophet said: "Precede the morning with Al-Witr."

Jami` at-Tirmidhi Book 3, Hadith 15 Next Hadith → Allah's Messenger said: "When Fajr begins, then every Salat of the night and Al-Witr have gone, so perform Al-Witr before Fajr begins."

Jami` at-Tirmidhi Book 3, Hadith 17