Allah the Almighty revealed the story of Shuaib : And to (the people of) Madyan (Madian) (We sent) their brother Shuaib. He said: "O my people! Worship Allah, you have no other Ilah (God) but Him. Verily, a clear proof (sign) from your Lord has come unto you; so give full measure and full weight and wrong not men in their things, and do not mischief on the earth after it has been set in order, that will be better for you, if you are believers. And sit not on every road, threatening, and hindering from the Path of Allah those who believe in Him, and seeking to make it crooked. And remember when you were but few, and He multiplied you. And see what was the end of the Mufsideen (mischief-makers, corrupts, liars). And if there is a party of you who believes in that which I have been sent and a party who do not believe, so be patient until Allah judges between us, and He is the Best of judges."
Related Quran Ayaaths of this Hadith.
Surah 7 : Ayah 85Surah 7 : Ayah 88Surah 11 : Ayah 84Surah 11 : Ayah 87Surah 11 : Ayah 91Surah 11 : Ayah 94Surah 26 : Ayah 177"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