Sahih Muslim , Book 5, Hadith 402 (In-Book) ⓘ

Qatada reported from Anas b. Malik that the Messenger of Allah said: He who forgets the prayer should say it when he remembers it, there is no explation for it, except this. Qatada said: (Allah says)" And observe prayer for remembrance of Me"

حَدَّثَنَا هَدَّابُ بْنُ خَالِدٍ، حَدَّثَنَا هَمَّامٌ، حَدَّثَنَا قَتَادَةُ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ مَنْ نَسِيَ صَلاَةً فَلْيُصَلِّهَا إِذَا ذَكَرَهَا لاَ كَفَّارَةَ لَهَا إِلاَّ ذَلِكَ ‏" ‏ ‏.‏ قَالَ قَتَادَةُ وَأَقِمِ الصَّلاَةَ لِذِكْرِي ‏.‏