´It was narrated that Anas bin Malik said:` 'The Prophet was asked about a man who forgets prayer or sleeps and misses it. He said: 'he performs it when he remembers it.'"
Hadith ReferenceSunan Ibn Majah / The Book of the Prayer / Hadith: 695
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم