Abu al-Tufayl said: I heard Sayyiduna Ibn Abbas (may Allah be pleased with them both) say: "We used to call it Shabba'ah (the one that satisfies fully) - meaning Zamzam - and we found it the best of helps in providing for our families."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10591