Allah granted David great influence. His people had a great number of wars in their time, but they had a problem in that the iron armor was too heavy for the fighter to move and fight as he wished. It is said that David was sitting one day, contemplating this problem while toying with a piece of iron. Suddenly, he found his hand sinking in the iron. Almighty Allah had made it flexible for him: And We made the iron soft for him. Surah 34: 10
Related Quran Ayaaths of this Hadith.
Surah 6 : Ayah 84 Surah 4 : Ayah 163 Surah 11 : Ayah 25 Surah 11 : Ayah 32 Surah 11 : Ayah 36 Surah 17 : Ayah 55 Surah 27 : Ayah 15 Surah 27 : Ayah 16"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari