Jami` at-Tirmidhi 981

حَدَّثَنَا زِيَادُ بْنُ أَيُّوبَ، حَدَّثَنَا مُبَشِّرُ بْنُ إِسْمَاعِيلَ الْحَلَبِيُّ، عَنْ تَمَّامِ بْنِ نَجِيحٍ، عَنِ الْحَسَنِ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَا مِنْ حَافِظَيْنِ رَفَعَا إِلَى اللَّهِ مَا حَفِظَا مِنْ لَيْلٍ أَوْ نَهَارٍ فَيَجِدُ اللَّهُ فِي أَوَّلِ الصَّحِيفَةِ وَفِي آخِرِ الصَّحِيفَةِ خَيْرًا إِلاَّ قَالَ اللَّهُ تَعَالَى أُشْهِدُكُمْ أَنِّي قَدْ غَفَرْتُ لِعَبْدِي مَا بَيْنَ طَرَفَىِ الصَّحِيفَةِ ‏"‏ ‏.‏

Anas bin Malik narrated that:The Messenger of Allah said: "There is nothing that the two Guardian Angels raise to Allah that they have preserved in a day or night, and Allah finds good in the beginning of the scroll and in the end of the scroll, except that Allah Most High says: 'Bear witness that I have forgiven my servant for what is included in the scroll