عن أنس رضي الله عنه قال: قال النبي صلى الله عليه وسلم: لو تعلمون ما أعلم لضحكتم قليلا ولبكيتم كثيرا (صحيح البخاري، الرقم: 6486)

Hazrat Anas (radhiyallahu ‘anhu) reports that the Nabi of Allah (sallallahu ‘alaihi wasallam) said, “If only you people knew that which I know (regarding the Hereafter and the severe punishment in store for those who transgress the limits of the Shari‘ah), then certainly you would laugh little and weep abundantly.”