[16].Surah An-Nahl [The Bees] : Ayat 53-55

Ayat 53. And whatever of blessings and good things you have, it is from Allah. Then, when harm touches you, unto Him you cry aloud for help.

Ayat 54. Then, when He has removed the harm from you, behold! Some of you associate others in worship with their Lord (Allah).

Ayat 55. So (as a result of that ) they deny (with ungratefulness) that (Allah's Favours) which We have bestowed on them! Then enjoy yourselves (your short stay), but you will come to know (with regrets).

Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah  [SAWW](PBUH) said, "Allah, the Exalted, says: 'I have no reward other than Jannah for a believing slave of Mine who remains patient for My sake when I take away his beloved one from among the inhabitants of the world".  [Al-Bukhari 08, Chapter 76, Hadith # 432]. 

Lesson : as mentioned above in Surah An-Nahl Ayat 53.And whatever of blessings and good things you have, it is from Allah. Then, when harm touches you, unto Him you cry aloud for help. Child, wife and parents, etc., are the dearest people to everyone. It is a great sign of Faith to accept their death as the Will of Allah, to bear their loss with patience. Wailing and saying nonsense things show weakness of Faith. The reward of patience on such tragedies is Jannah while the result of impatience is displeasure of Allah.