People who will come on the Day of Resurrection with good deeds mountains, but Allaah will make them like scattered dust.

Hadith: Arabic Text followed by English Translation.

عَنْ ثَوْبَانَ رضي الله عنه عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّهُ قَالَ :

لَأَعْلَمَنَّ أَقْوَامًا مِنْ أُمَّتِي يَأْتُونَ يَوْمَ الْقِيَامَةِ بِحَسَنَاتٍ أَمْثَالِ جِبَالِ تِهَامَةَ بِيضًا ، فَيَجْعَلُهَا اللَّهُ عَزَّ وَجَلَّ هَبَاءً مَنْثُورًا . قَالَ ثَوْبَانُ : يَا رَسُولَ اللَّهِ صِفْهُمْ لَنَا جَلِّهِمْ لَنَا ، أَنْ لَا نَكُونَ مِنْهُمْ وَنَحْنُ لَا نَعْلَمُ . قَالَ : أَمَا إِنَّهُمْ إِخْوَانُكُمْ وَمِنْ جِلْدَتِكُمْ وَيَأْخُذُونَ مِنْ اللَّيْلِ كَمَا تَأْخُذُونَ ، وَلَكِنَّهُمْ أَقْوَامٌ إِذَا خَلَوْا بِمَحَارِمِ اللَّهِ انْتَهَكُوهَا

رواه ابن ماجه (4245) وصححه الألباني في صحيح ابن ماجه

Thawbaan (may Allah be pleased with him) that the Prophet (blessings and peace of Allah be upon him) said:

“I certainly know people of my ummah who will come on the Day of Resurrection with good deeds like the mountains of Tihaamah, but Allaah will make them like scattered dust.”

Thawbaan said: O Messenger of Allaah, describe them to us and tell us more, so that we will not become of them unknowingly. He said:

“They are your brothers and from your race, worshipping at night as you do, but they will be people who, when they are alone, transgress the sacred limits of Allaah.”

Ibn Majah (4245) and classed as Saheeh by Albani in Saheeh Ibn Majah