Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ahmad:27499And Hb b. Jarīr from my father > Yūnus > al-Zuhrī > Abū al-Dardāʾ

[Machine] "While we were with the Messenger of Allah ﷺ, discussing future events, he said: 'When you hear about a mountain moving from its place, believe in it. And when you hear about a person changing his character, do not believe in him, as he will eventually revert to his original state.'"  

أحمد:٢٧٤٩٩حَدَّثَنَا وَهْبُ بْنُ جَرِيرٍ قَالَ حَدَّثَنَا أَبِي قَالَ سَمِعْتُ يُونُسَ يُحَدِّثُ عَنِ الزُّهْرِيِّ أَنَّ أَبَا الدَّرْدَاءِ قَالَ

بَيْنَمَا نَحْنُ عِنْدَ رَسُولِ اللهِ ﷺ نَتَذَاكَرُ مَا يَكُونُ إِذْ قَالَ رَسُولُ اللهِ ﷺ إِذَا سَمِعْتُمْ بِجَبَلٍ زَالَ عَنْ مَكَانِهِ فَصَدِّقُوا وَإِذَا سَمِعْتُمْ بِرَجُلٍ تَغَيَّرَ عَنْ خُلُقِهِ فَلَا تُصَدِّقُوا بِهِ وَإِنَّهُ يَصِيرُ إِلَى مَا جُبِلَ عَلَيْهِ  


See similar narrations below:

Collected by Suyūṭī
suyuti:2002a
Request/Fix translation

  

السيوطي:٢٠٠٢a

"إذا سَمِعْتُمْ بجَبلٍ زالِ عَنْ مَكانه فَصَدِّقوا، وإذا سَمِعْتُمْ بِرجُلٍ زال عن خُلُقِه فلا تُصدِّقوا؛ فإنَّه يَصِيرُ إِلى ما جُبِلَ علْيهِ" .  

[حم] أحمد عن أبي الدرداء وصُحح