Abu Huraira reported: The Prophet, peace and blessings be upon him, said, “None will enter Paradise but that he will be shown the place he would have occupied in Hellfire if he had done evil, so that he may be more thankful. None will enter the Hellfire but that he will be shown the place he would have occupied in Paradise if he had done good, so that it may be a cause of sorrow for him.”
Source: Ṣaḥīḥ al-Bukhārī 6200
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ أَبِي هُرَيْرَةَ قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا يَدْخُلُ أَحَدٌ الْجَنَّةَ إِلَّا أُرِيَ مَقْعَدَهُ مِنْ النَّارِ لَوْ أَسَاءَ لِيَزْدَادَ شُكْرًا وَلَا يَدْخُلُ النَّارَ أَحَدٌ إِلَّا أُرِيَ مَقْعَدَهُ مِنْ الْجَنَّةِ لَوْ أَحْسَنَ لِيَكُونَ عَلَيْهِ حَسْرَةً
6200 صحيح البخاري كتاب الرقاق باب صفة الجنة والنار