مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 603
Prayer
Observing Prayer Early in the Period - Section 1
وَعَنْ أَنَسٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ نَسِيَ صَلَاةً أَوْ نَامَ عَنْهَا فَكَفَّارَتُهُ أَنْ يُصَلِّيَهَا إِذَا ذَكَرَهَا» . وَفِي رِوَايَةٍ: «لَا كَفَّارَة لَهَا إِلَّا ذَلِك»
Anas reported God's Messenger as saying, “If anyone forgets a stated prayer or oversleeps, expiation is made by observing it when he remembers it.” A version has “That is the only expiation for it.” (Bukhari and Muslim.)
Mishkat al-Masabih, 603مُتَّفَقٌ عَلَيْهِ (الألباني)