Malik related to me that he heard that Abdullah ibn Masud used tosay, "You must tell the truth. Truthfulness leads to right action.Right action leads to the Garden. Beware of lying. Lying leads tocorruption, and corruption leads to the Fire. Don't you see that it issaid, 'He speaks the truth and acts rightly,' and, 'He lies and iscorrupt.' "
USC-MSA web (English) reference: Book 56, Hadith 16
Arabic reference: Book 56, Hadith 1829