5 chains merged

He who forgets the prayer, or he slept (and it was omitted), its expiation is (only) that he should observe it when he remembers it.

Allah's Messenger (ﷺ) said: "Whoever sleeps past Al-Witr or forgets it, then let him pray it when he remembers it or when he awakens."

If any one forgets a prayer or oversleeps, he should observe it when he remembers it ; there is no expiation for it except that.

The Prophet (ﷺ) said: If anyone oversleeps and misses the witr, or forgets it, he should pray when he remembers.

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].