Demise of the Holy Prophet's (sa) Grandson

Hazrat Usama bin Zaid (ra) states:

“One of the daughters of the Holy Prophet(sa) said to me that her son was on his deathbed and that the Holy Prophet(sa) should come to see them. The Holy Prophet (sa) sent word back saying, ‘He belongs to Allah, Who bestows and can call him back at any moment. God Almighty has fixed a term for everything, therefore you ought to be steadfast and seek the pleasure of God Almighty.’ She then sent for the Holy Prophet (sa) again and this time swore by God for him to come to see them. The Holy Prophet (sa) stood up and at the time, Hazrat Sa‘d (ra) bin Ubadah, Hazrat Mu‘az (ra) bin Jabal, Hazrat Ubayy (ra) bin Ka‘b, Hazrat Zaid (ra) bin Thabit and many other companions were seated around him. When the Holy Prophet (sa) went to see them, the child was brought before him and from the sound he was making, it became evident that he was breathing his last breaths.” Hazrat Uthman (ra) stated that “the sound was like that of two old water skins rubbing against one another. Upon seeing the child in such condition, the Holy Prophet (sa) was moved to tears. Hazrat Sa‘d (ra) said, ‘O Messenger (sa) of Allah! What is this?’ to which the Holy Prophet (sa) replied, “This is owing to the mercy God Almighty has placed in the hearts of people, and God Almighty only bestows His mercy to those people who show mercy to others.’”

(Sahih al-Bukhari, Kitabul Janaiz, Bab Qaul an-Nabi Yu’adhabul Mayyitu bi Buka Ahlihi…, Hadith 1284)

This emotional state is not something out of the ordinary, it is simply due to the grace of Allah the Almighty.