Al-Kafi- Sheikh Al-Koleini vol.2 p.96:
Abou Baseer reported that Abou Abdellah (pbuh) said: "Any man amongst you when drinking a sip of water can certainly gain from Allah entering Heaven," and then he said: "He takes the pitcher, puts it on his mouth, utters 'In the Name of Allah the Most Gracious, the Most Merciful,' drinks and then moves it away, desiring more, thanks Allah, drinks again, moves it again, thanks Allah, drinks again, moves it away and then thanks Allah. Thus, Allah Almighty shall certainly make him enter Heaven."
