Abu Huraira reported: The Prophet, peace and blessings be upon him, came out to a group of his companions while they were laughing and talking. The Prophet said, “By the One in whose hand is my soul, if you knew what I knew, you would laugh little and weep often.” The Prophet departed and people started weeping, so Allah Almighty revealed to him, “O Muhammad, why have you made My servants despair?” The Prophet returned and he said, “Give glad tidings, follow the right course, and seek nearness to Allah.”
Source: al-Adab al-Mufrad lil-Bukhārī 254
Grade: Sahih (authentic) according to Al-Albani
عَنْ أَبِي هُرَيْرَةَ قَالَ خَرَجَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَى رَهْطٍ مِنْ أَصْحَابِهِ يَضْحَكُونَ وَيَتَحَدَّثُونَ فَقَالَ وَالَّذِي نَفْسِي بِيَدِهِ لَوْ تَعْلَمُونَ مَا أَعْلَمُ لَضَحِكْتُمْ قَلِيلاً وَلَبَكَيْتُمْ كَثِيرًا ثُمَّ انْصَرَفَ وَأَبْكَى الْقَوْمَ وَأَوْحَى اللَّهُ عَزَّ وَجَلَّ إِلَيْهِ يَا مُحَمَّدُ لِمَ تُقَنِّطُ عِبَادِي فَرَجَعَ النَّبِيُّ صلى الله عليه وسلم فَقَالَ أَبْشِرُوا وَسَدِّدُوا وَقَارِبُوا
254 الأدب المفرد البخاري باب الضحك
191 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الأدب المفرد