(37) باب مَنْ نَسِيَ صَلاَةً فَلْيُصَلِّ إِذَا ذَكَرَهَا وَلاَ يُعِيدُ إِلاَّ تِلْكَ الصَّلاَةَ
Narrated Anas:
The Prophet (ﷺ) said, "If anyone forgets a prayer he should pray that prayer when he remembers it. There is no expiation except to pray the same." Then he recited: "Establish prayer for My (i.e. Allah's) remembrance." (20.14). (ES)
Reference (ES): Sahih al-Bukhari 597 (ES)
In-book reference (ES): Book 9, Hadith 73 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 10, Hadith 571 (ES)