(10) باب مَنْ نَامَ عَنِ الصَّلاَةِ، أَوْ نَسِيَهَا
It was narrated that Anas bin Malik said:
"The Messenger of Allah said: 'Whoever forgets a prayer, let him perform it when he remembers it.'"
Reference: Sunan Ibn Majah 696
In-book reference: Book 2, Hadith 30
English translation: Vol. 1, Book 2, Hadith 696