Allah's Messenger said: "Whoever sleeps past Al-Witr or forgets it, then let him pray it when he remembers it or when he awakens."
Jami` at-Tirmidhi Book 3, Hadith 13
← Previous Hadith "Allah's Messenger taught me some phrases to say during Al-Witr (Allahummahdini fiman hadait, wa a'fini fiman afait, wa tawallani fiman tawallait, wa barik Li fima atait, wa qini sharra ma qadait, fa Innaka taqdi wa la yuqda Alaik, wa innahu la yadhillu man walait, tabarakta Rabbana wa ta'alait.) 'O Allah guide me among those You have guided, pardon me among those You have pardoned, befriend me among those You have befriended, bless me in what You have granted, and save me from the evil that You decreed. Indeed You decree, and none can pass decree, and none can pass decree upon You, indeed he is not humiliated whom You have befriended, blessed are You our Lord and Exalted.'"

Jami` at-Tirmidhi Book 3, Hadith 12 Next Hadith → the Prophet said: "Whoever sleeps past his Al-Witr then let him pray it in the morning."

Jami` at-Tirmidhi Book 3, Hadith 14