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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
ahmad:23816 – Hāshim b. al-Qāsim > al-Faraj > Sulaymān b. Sulaym

[Machine] Al-Miqdad bin Al-Aswad said, "I do not judge a person as good or bad until I see what results from their actions, meaning after observing their behavior. Someone asked, "And what have you observed?" He replied, "I have heard the Prophet ﷺ saying that the heart of the son of Adam changes more swiftly than the boiling of a pot when anger is present."  

أحمد:٢٣٨١٦ – حَدَّثَنَا هَاشِمُ بْنُ الْقَاسِمِ حَدَّثَنَا الْفَرَجُ حَدَّثَنَا سُلَيْمَانُ بْنُ سُلَيْمٍ

قَالَقَالَ الْمِقْدَادُ بْنُ الْأَسْوَدِ لَا أَقُولُ فِي رَجُلٍ خَيْرًا وَلَا شَرًّا حَتَّى أَنْظُرَ مَا يُخْتَمُ لَهُ يَعْنِي بَعَدَ شَيْءٍ سَمِعْتُهُ مِنَ النَّبِيِّ ﷺ قِيلَ وَمَا سَمِعْتَ؟ قَالَ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ لَقَلْبُ ابْنِ آدَمَ أَشَدُّ انْقِلَابًا مِنَ الْقِدْرِ إِذَا اجْتَمَعَتْ غَلْيًا  

See similar narrations below:

Collected by Ṭabarānī
tabarani:17801 – [Chain 1] al-Miqdām b. Dāwud al-Miṣrī > Asad b. Mūsá [Chain 2] ʿUmar b. Ḥafṣ al-Sadūsī > ʿĀṣim b. ʿAlī > Faraj b. Faḍālah > Sulaym b. ʿĀmir > al-Miqdād b. al-Aswad

[Machine] I do not speak of anyone as good or evil until I see the outcome of their actions after hearing what I have heard from the Messenger of Allah ﷺ . He asked, "And what have you heard from the Messenger of Allah ﷺ ?" He replied, "I have heard the Messenger of Allah ﷺ say, 'The heart of the son of Adam is more inclined to fluctuation than anything else when it becomes heated.'"  

الطبراني:١٧٨٠١ – حَدَّثَنَا الْمِقْدَامُ بْنُ دَاوُدَ الْمِصْرِيُّ ثنا أَسَدُ بْنُ مُوسَى ح وَحَدَّثَنَا عُمَرُ بْنُ حَفْصٍ السَّدُوسِيُّ ثنا عَاصِمُ بْنُ عَلِيٍّ قَالَا ثنا فَرَجُ بْنُ فَضَالَةَ عَنْ سُلَيْمِ بْنِ عَامِرٍ عَنِ الْمِقْدَادِ بْنِ الْأَسْوَدِ قَالَ

لَا أَقُولُ فِي أَحَدٍ خَيْرًا وَلَا شَرًّا حَتَّى أَنْظُرَ مَا يُخْتَمُ بِهِ عَمَلُهُ بَعْدَ شَيْءٍ سَمِعْتُهُ مِنْ رَسُولِ اللهِ ﷺ قَالَ وَمَا سَمِعْتَ مِنْ رَسُولِ اللهِ ﷺ؟ قَالَ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «لَقَلْبُ ابْنِ آدَمَ أَشَدُّ انْقِلَابًا مِنَ الْقِدْرِ إِذَا اسْتَجْمَعَتْ غَلْيًا»