442Abu DawoodSahih (Al-Albani)حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ، أَخْبَرَنَا هَمَّامٌ، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ مَنْ نَسِيَ صَلاَةً فَلْيُصَلِّهَا إِذَا ذَكَرَهَا لاَ كَفَّارَةَ لَهَا إِلاَّ ذَلِكَ " Anas b. Malik reported the Prophet (ﷺ) as saying:If any one forgets a prayer or oversleeps, he should observe it when he remembers it ; there is no expiation for it except that.Reference: Sunan Abi Dawud 442 In-book : Book 2, Hadith 52 English translation : Book 2, Hadith 442