The well of Zam Zam
The Bible makes a reference of the miracle of Zamzam when it talks about the passing through of Ismail (upon him be peace) and his mother through the valley: “Blessed is the man whose strength is in Thee; in whose heart are the ways of them who passing through the valley of Bacca make it a well.” [Psalm 84:5-6. Note that the Quran also refers to Makkah as Bakkah]*
The well of Zam Zam is no longer accessible to the pilgrims. It used to be situated between the Maqam of Ibrahim and the beginning of Mount Safa.
The well of Zam Zam was discovered by the babe Isma’il (AS) and his mother Hagar (AS) whilst she was running between Mount Safa and Marwa looking for water as he, Isma’il (AS), was crying out of hunger and thirst.
They were left there by Prophet Ibrahim (AS) on the command of Allah (SWT). After Hagar (AS) ran seven circuits of Safa and Marwa an Angel appeared by the place where Zam Zam was and started to dig until water appeared. Hagar (AS) continued digging around the well and took the water that she needed for herself and Isma’il (AS).
Due to this new source of water, peoples and tribes started to settle around Isma’il (AS) and Hagar (AS) and around the Zam Zam well. This formed the early Makkan community.
Zam Zam stayed with the tribes of Makkah until it was buried by the tribe of Jurhum upon their expulsion from Makkah. Several hundred years later, the well was rediscovered by ‘Abdul Muttalib, the Prophet’s grandfather, through a series of dreams in which he was directed to dig back up the well of Zam Zam.
It has been with us since then and continues to quench the thirst of millions of pilgrims every year that attend the Minor (Umrah) and Major (Hajj) Pilgrimage.
* Source of quote: http://www.islamiclandmarks.com/saudi/makkah/haram_sharief/zamzam.html