وَفِي رِوَايَةٍ لِمُسْلِمٍ: { وَهِيَ سَاعَةٌ خَفِيفَةٌ } 1‏.‏

‏1 ‏- مسلم (852)‏ (15)‏.‏

Translation
Narrated [Abu Sa'id al-Khudri (RA)]

Allah's Messenger (ﷺ) said: "Whoever oversleeps and misses the Witr, or forgets it, should pray (when he awakens) in the moming or when he remembers."[Reported by al-Khamsah except an-Nasa'i].