Sunan Ibn Majah 3061

ʿAlī ibn Muḥammad narrated to us: ʿUbayd Allāh ibn Mūsā narrated to us, from ʿUthmān ibn al-Aswad, from Muḥammad ibn ʿAbd al-Raḥmān ibn Abī Bakr, who said: I was sitting with Ibn ʿAbbās when a man came to him. He asked, “Where have you come from?” The man said, “From Zamzam.” He asked, “Did you drink from it as one should?” The man said, “How is that?” He replied, “When you drink from it, face the Kaʿbah, invoke the name of God, breathe three times, and drink your fill. When you finish, praise God, Mighty and Majestic. The Messenger of God (peace and blessings be upon him) said that the sign separating us from the hypocrites is their not drinking their fill from Zamzam.”