Usama b. Zaid said the Prophet’s daughter sent him a message telling him that a son of hers was dying and asking him to come to them. He sent her a greeting, saying at the same time, “What Allah has taken belongs to Him, what He has given belongs to Him, and He has an appointed time for everyone, so let her show endurance and seek her reward from Allah.” She then sent adjuring him to come to her, and he got up to go accompanied by Sa'd b. ‘Ubada, Mu'adh b. Jabal, Ubayy b. Ka'b, Zaid b. Thabit and some other men. The boy who was on the point of death (This is an attempt to express the meaning of the Arabic which says literally ‘his soul was disquieted [or, restless]) was lifted up to Allah's Messenger ﷺ whose eyes overflowed with tears. Sa'd said, “What is this, Messenger of Allah ?” He replied, “This is compassion which Allah has placed in the hearts of His servants. Allah shows compassion only to those of His servants who are compassionate.” (Bukhari and Muslim.)