In the name of Allah, Most Gracious, Most Merciful.
Narrated Abdullah (May Allah be satisfied with him): ‘The Prophet (May Allah exalt his mention and protect him from imperfection) said: “Truthfulness leads to righteousness. Righteousness leads to Paradise. And a man keeps on telling the truth until he becomes an extremely truthful person. Falsehood leads to wickedness. Wickedness leads to the Hellfire, and a man may keep on telling lies until he is written before Allah as a liar.” (Bukhari)
Riyaadiss-Saliheen (The Meadows of the Righteous) (Abridged)
By Imam An Nawawi Vol. (1)
Publisher: Dar Al-Manarah
Chapiter 4, Page 141, Number 48