Abu Musa Al-Ash`ari (May Allah be pleased with him) reported: The Messenger of Allah (PBUH) said, "When a slave's child dies, Allah the Most High asks His angels, `Have you taken out the life of the child of My slave?" They reply in the affirmative. He then asks, `Have you taken the fruit of his heart?' They reply in the affirmative. Thereupon he asks, `What has My slave said?' They say: `He has praised You and said: Inna lillahi wa inna ilaihi raji`un (We belong to Allah and to Him we shall be returned). Allah says: `Build a house for My slave in Jannah and name it as Bait-ul-Hamd (the House of Praise).'''
[At-Tirmidhi].

Commentary: This Hadith points out the eminence of patience and the merit of praising Allah in the event of a calamity, especially on the death of one's own child. Rather than weeping and wailing, one should submit himself to the Will of Allah and show perseverance. Such attitude of patience and resignation is highly meritorious and has great reward.