Sahih Adab al-Mufrad

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he said that the Prophet (peace and blessings be upon him) went to some of his companions who were laughing and talking. Upon this, the Prophet (peace and blessings be upon him) said: "By Him in Whose hand is my soul, if you knew what I know, you would laugh little and weep much." Then the Prophet (peace and blessings be upon him) turned back and made the people weep. And Allah, the Mighty and Majestic, sent revelation to him: O Muhammad (peace and blessings be upon him), why do you make My servants despair? So the Prophet (peace and blessings be upon him) returned and said: "Rejoice, follow the straight path, and come closer to one another."