Jami` at-Tirmidhi 2596
Abu Dharr narrated that the Messenger of Allah (s.a.w) said:
" I know the last of the people of the Fire to depart from the Fire and the last of the people of Paradise to enter Paradise. A man will be brought forth and He (s.a.w) will say: 'Ask about his small sins and hide his large sins.' So it will be said to him: 'Did you do this and that on such and such a day, did you do this and that on  such- and – such a day?'” He said: “Then it will be said to him; 'For each of your sins  you shall have a reward.'” He (s.a.w) said: “So he will say: 'O Lord! I have done things that I do not see here.'” He (Abu Dharr) said: “I saw the Messenger of Allah (s.a.w) laugh  until his molars were visible.” (Sahih)
حَدَّثَنَا هَنَّادٌ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنِ الْمَعْرُورِ بْنِ سُوَيْدٍ، عَنْ أَبِي ذَرٍّ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ إِنِّي لأَعْرِفُ آخِرَ أَهْلِ النَّارِ خُرُوجًا مِنَ النَّارِ وَآخِرَ أَهْلِ الْجَنَّةِ دُخُولاً الْجَنَّةَ يُؤْتَى بِرَجُلٍ فَيَقُولُ سَلُوا عَنْ صِغَارِ ذُنُوبِهِ وَاخْبَئُوا كِبَارَهَا ‏.‏ فَيُقَالُ لَهُ عَمِلْتَ كَذَا وَكَذَا يَوْمَ كَذَا وَكَذَا عَمِلْتَ كَذَا وَكَذَا فِي يَوْمِ كَذَا وَكَذَا ‏.‏ قَالَ فَيُقَالُ لَهُ فَإِنَّ لَكَ مَكَانَ كُلِّ سَيِّئَةٍ حَسَنَةً ‏.‏ قَالَ فَيَقُولُ يَا رَبِّ لَقَدْ عَمِلْتُ أَشْيَاءَ مَا أَرَاهَا هَا هُنَا ‏"‏ ‏.‏ قَالَ فَلَقَدْ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَضْحَكُ حَتَّى بَدَتْ نَوَاجِذُهُ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏