It was
narrated from Anas bin Malik that the Messenger of Allah (ﷺ)
said:
“If you knew what I know, you would laugh little and weep much.”
Reference: 4191English reference: Vol. 1, Book 37, Hadith 4191Arabic reference: Book 37, Hadith 4331In-book reference: Book 37, Hadith 92Grade: Sahih (Darussalam)Read this hadith from Darussalam Collection
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الصَّمَدِ بْنُ عَبْدِ الْوَارِثِ، حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ . " لَوْ تَعْلَمُونَ مَا أَعْلَمُ لَضَحِكْتُمْ قَلِيلاً وَلَبَكَيْتُمْ كَثِيرًا "