Sahih al-Bukhari 6560
Narrated Abu Sa`id Al-Khudri:
Allah's Messenger (ﷺ) said, "When the people of Paradise have entered Paradise, and the people of the Fire 
have entered the Fire, Allah will say. 'Take out (of the Fire) whoever has got faith equal to a mustard 
seed in his heart.' They will come out, and by that time they would have burnt and became like coal, 
and then they will be thrown into the river of Al-Hayyat (life) and they will spring up just as a seed 
grows on the bank of a rainwater stream." The Prophet (ﷺ) said, "Don't you see that the germinating seed 
comes out yellow and twisted?"
حَدَّثَنَا مُوسَى، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا عَمْرُو بْنُ يَحْيَى، عَنْ أَبِيهِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ ‏"‏ إِذَا دَخَلَ أَهْلُ الْجَنَّةِ الْجَنَّةَ، وَأَهْلُ النَّارِ النَّارَ يَقُولُ اللَّهُ مَنْ كَانَ فِي قَلْبِهِ مِثْقَالُ حَبَّةٍ مِنْ خَرْدَلٍ مِنْ إِيمَانٍ فَأَخْرِجُوهُ‏.‏ فَيُخْرَجُونَ قَدِ امْتُحِشُوا وَعَادُوا حُمَمًا، فَيُلْقَوْنَ فِي نَهَرِ الْحَيَاةِ، فَيَنْبُتُونَ كَمَا تَنْبُتُ الْحِبَّةُ فِي حَمِيلِ السَّيْلِ ـ أَوْ قَالَ ـ حَمِيَّةِ السَّيْلِ ‏"‏‏.‏ وَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ أَلَمْ تَرَوْا أَنَّهَا تَنْبُتُ صَفْرَاءَ مُلْتَوِيَةً ‏"‏‏.‏