The Messenger of Allah ﷺ said, "If you knew what I know, you would laugh little and weep much."
حدثنا وكيع حدثنا أبو العميس عن أبي طلحة الأسدي قال سمعت
قال رسول الله ﷺ لو تعلمون ما أعلم لضحكتم قليلا ولبكيتم كثيرا
Its isnad is sahih. Abu Umays is Utba bin Abdullah Masudi, and Abu Talha Asadi, no lineage has been mentioned for him, and he is deemed acceptable. The hadith has already appeared at 12507.