Sunan Ibn Majah 3061

It was narrated that Muhammad bin ‘Abdur-Rahman bin Abu Bakr said:“I was sitting with Ibn ‘Abbas, and a man came to him and he said: ‘Where have you come from?’ He said: ‘From Zamzam.’ He said: ‘Did you drink from it as you should?’ He said: ‘How is that?’ He said: ‘When you drink from it, turn to face the Qiblah and mention the name of Allah, drink three draughts and drink your fill of it. When you have finished, then praise Allah.’ The Messenger of Allah (ﷺ) said: ‘The sign (that differentiates) between us and the hypocrites is that they do not drink their fill from Zamzam.”