Jabir reported: The Messenger of Allah, peace and blessings be upon him, said, “Some people among those who worshiped Allah alone will be punished in Hellfire until they are coals. Then, the mercy of Allah will reach them and they will be taken out and presented at the gates of Paradise. The people of Paradise will pour water over them and they will grow just as the stubble carried by the stream grows. Then, they will enter Paradise.”
Source: Sunan al-Tirmidhī 2597
Grade: Sahih (authentic) according to Al-Albani
عَنْ جَابِرٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُعَذَّبُ نَاسٌ مِنْ أَهْلِ التَّوْحِيدِ فِي النَّارِ حَتَّى يَكُونُوا فِيهَا حُمَمًا ثُمَّ تُدْرِكُهُمْ الرَّحْمَةُ فَيُخْرَجُونَ وَيُطْرَحُونَ عَلَى أَبْوَابِ الْجَنَّةِ قَالَ فَيَرُشُّ عَلَيْهِمْ أَهْلُ الْجَنَّةِ الْمَاءَ فَيَنْبُتُونَ كَمَا يَنْبُتُ الْغُثَاءُ فِي حِمَالَةِ السَّيْلِ ثُمَّ يَدْخُلُونَ الْجَنَّةَ
2597 سنن الترمذي كتاب صفة جهنم باب منه
2597 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الترمذي