The Prophet Muhammad said: 'This is the source of the tradition of the Sa'y (One of the rituals of the hajj, or pilgrimage) the going of people between them (i.e. As-Safa and Al-Marwa). When she reached Al- Marwa (for the last time) she heard a voice and she asked herself to be quiet and listened attentively. She heard the voice again and said: 'O, (whoever you may be)! You have made me hear your voice; have you got something to help me?' And behold! She saw an angel at the place of Zam-zam, digging the earth with his heel (or his wing) till water flowed from that place. She started to make something like a basin around it, using her hand in this way, and started filling her water-skin with water with her hands, and the water was flowing out after she had scooped some of it."
The Prophet added: "May Allah bestow mercy on Ishmael's mother! Had she let the Zam-zam (flow without trying to control it or had she not scooped from that water to fill her water-skin), Zam-zam would have been a stream flowing on the surface of the earth."
Related Quran Ayaaths of this Hadith.
Surah 6 : Ayah 86 Surah 4 : Ayah 163 Surah 6 : Ayah 86 Surah 38 : Ayah 4 Surah 14 : Ayah 39 Surah 19 : Ayah 54 Surah 21 : Ayah 85"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