Hazrat Abu Saeed Khudri narrates that one day we found the Messenger of Allah صلی اللہ علیہ وسلم in a state of sadness, so some people said, "O Messenger of Allah صلی اللہ علیہ وسلم ! May my parents be sacrificed for you, why do I see you like this?" The Noble Prophet صلی اللہ علیہ وسلم said: "I heard a sound, the like of which I had never heard before. I asked Jibreel, 'What is this?' Jibreel (peace be upon him) replied: 'Seventy years ago, a stone was thrown into the depths of Hell; today it has reached its bottom.'" Hazrat Abu Saeed Khudri (may Allah be pleased with him) said: "By the One who gave Muhammad صلی اللہ علیہ وسلم death, I did not see him صلی اللہ علیہ وسلم laughing after that day until he departed from this world."