" يرحم الله أم إسماعيل لو تركت زمزم أو قال لو لم تغرف من الماء لكانت عينا معينا"
The Prophet (peace and blessings be upon him) said:
"May Allah have mercy on the mother of Isma'il (peace be upon him)! Had she left Zamzam to flow as it was, or he said: had she not scooped up its water by the handful, it would have been a flowing spring."
Hadith Referenceصحیح الجامع الصغیر / حرف الياء / 8079