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

ذِكْرُ الْإِخْبَارِ عَمَّا يَجِبُ عَلَى الْمَرْءِ مِنْ لُزُومِ التَّسْدِيدِ فِي أَسْبَابِهِ مَعَ الِاسْتِبْشَارِ بِمَا يَأْتِي مِنْهَا

ibnhibban:358 – al-Faḍl b. al-Ḥubāb > ʿAbd al-Raḥman b. Bakr b. al-Rabīʿ b. Muslim > Muḥammad > Abū Hurayrah

The Prophet ﷺ said, "If you knew that which I know, you would laugh little and weep much." (Using translation from Bukhārī 6486)  

ابن حبّان:٣٥٨ – سَمِعْتُ الْفَضْلَ بْنَ الْحُبَابِ يَقُولُ سَمِعْتُ عَبْدَ الرَّحْمَنِ بْنَ بَكْرِ بْنِ الرَّبِيعِ بْنِ مُسْلِمٍ يَقُولُ سَمِعْتُ مُحَمَّدًا يَقُولُ

سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ مَرَّ رَسُولُ اللَّهِ ﷺ عَلَى رَهْطٍ مِنْ أَصْحَابِهِ يَضْحَكُونَ فقَالَ «لَوْ تَعْلَمُونَ مَا أَعْلَمُ لَضَحِكْتُمْ قَلِيلًا وَلَبَكَيْتُمْ كَثِيرًا» فَأَتَاهُ جِبْرِيلُ فقَالَ إِنَّ اللَّهَ قَالَ لَكَ لِمَ تُقَنِّطُ عِبَادِي؟ قَالَ فَرَجَعَ إِلَيْهِمْ وَقَالَ «سَدِّدُوا وَأَبْشِرُوا»  

See similar narrations below:

Collected by Ibn Ḥibbān

Believers must show moderation even in matters of amusement, happiness, and celebrations

ذِكْرُ الْبَيَانِ بِأَنَّ عَلَى الْعَالِمِ أَنْ لَا يُقَنِّطُ عِبَادَ اللَّهِ عَنْ رَحْمَةِ اللَّهِ

ibnhibban:113 – Abū Khalīfah > ʿAbd al-Raḥman b. Bakr b. al-Rabīʿ b. Muslim > al-Rabīʿ b. Muslim > Muḥammad > Abū Hurayrah

the Messenger of Allah ﷺ passed by a group of his Companions and they were laughing. Thereupon, he said, "If you ˹only˺ knew what I know, you would laugh little and weep a lot." Then Jibrīl came to him and said, "Allah says to you, 'Why are you putting my servants in despair?'" He said that he returned back to them then said, "Attempt moderation ˹in your actions as you˺ rejoice."  

ابن حبّان:١١٣ – سَمِعْتُ أَبَا خَلِيفَةَ يَقُولُ سَمِعْتُ عَبْدَ الرَّحْمَنِ بْنَ بَكْرِ بْنِ الرَّبِيعِ بْنِ مُسْلِمٍ يَقُولُ سَمِعْتُ الرَّبِيعَ بْنَ مُسْلِمٍ يَقُولُ سَمِعْتُ مُحَمَّدًا يَقُولُ سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ

مَرَّ رَسُولُ اللَّهِ ﷺ عَلَى رَهْطٍ مِنْ أَصْحَابِهِ وَهُمْ يَضْحَكُونَ فَقَالَ «لَوْ تَعْلَمُونَ مَا أَعْلَمُ لَضَحِكْتُمْ قَلِيلًا وَلَبَكَيْتُمْ كَثِيرًا» فَأَتَاهُ جِبْرِيلُ فَقَالَ إِنَّ اللَّهَ يَقُولُ لَكَ لِمَ تُقَنِّطُ عِبَادِي؟ قَالَ فَرَجَعَ إِلَيْهِمْ فَقَالَ «سَدِّدُوا وَقَارِبُوا وَأَبْشِرُوا»