Almighty Allah declared: And (remember) when We took from the Prophets their covenant, and from you (O Muhammad), and from Noah, Abraham, Moses, and Jesus - son of Mary. We took from them a strong covenant. Surah 33: 7
In another verse Allah the Exalted commanded: "So set you (O Muhammad) your face towards the religion of pure Islamic Monotheism Hanifan (worship none but Allah Alone) Allah's Fitrah (i.e. Allah's Islamic Monotheism), with which He has created mankind. No change let there be in khalqillah (i.e. the Religion of Allah - Islamic Monotheism), that is the straight religion, but most men know not." Surah 30:30
Related Quran Ayaaths of this Hadith.
Surah 2 : Ayah 31 Surah 2 : Ayah 33 Surah 2 : Ayah 34 Surah 2 : Ayah 35 Surah 2 : Ayah 37 Surah 7 : Ayah 11 Surah 7 : Ayah 19 Surah 7 : Ayah 26 Surah 7 : Ayah 27 Surah 7 : Ayah 31 Surah 7 : Ayah 35 Surah 3 : Ayah 33 Surah 3 : Ayah 59 Surah 5 : Ayah 27"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