Abu Sa’id Al-Khudri reported: The Messenger of Allah, peace be upon him, said, “Allah will enter the people of Paradise into Paradise among whoever He wills from His mercy, and He will enter the people of Fire into the Fire, then He will say: Look for those whom you find faith in their hearts as much as a mustard seed and bring them out. Then they will be brought out having been burned and turned into charcoal. They will be thrown into the River of Life and will sprout just as a seed in the silt is carried away by the flood. Have you not seen that it comes out yellow and entwined?”
[Sahih Muslim, Book 1, Number 355]
عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ يُدْخِلُ اللَّهُ أَهْلَ الْجَنَّةِ الْجَنَّةَ يُدْخِلُ مَنْ يَشَاءُ بِرَحْمَتِهِ وَيُدْخِلُ أَهْلَ النَّارِ النَّارَ ثُمَّ يَقُولُ انْظُرُوا مَنْ وَجَدْتُمْ فِي قَلْبِهِ مِثْقَالَ حَبَّةٍ مِنْ خَرْدَلٍ مِنْ إِيمَانٍ فَأَخْرِجُوهُ فَيُخْرَجُونَ مِنْهَا حُمَمًا قَدْ امْتَحَشُوا فَيُلْقَوْنَ فِي نَهَرِ الْحَيَاةِ أَوْ الْحَيَا فَيَنْبُتُونَ فِيهِ كَمَا تَنْبُتُ الْحِبَّةُ إِلَى جَانِبِ السَّيْلِ أَلَمْ تَرَوْهَا كَيْفَ تَخْرُجُ صَفْرَاءَ مُلْتَوِيَةً
(صحيح مسلم كتاب الإيمان باب إثبات الشفاعة وإخراج الموحدين من النار)