Malik related to me that he heard that Abdullah ibn Masud used to say, "The slave continues to lie and a black spot grows in his heart until all his heart becomes black. Then he is written, in Allah's sight, among the liars."
| Sunnah.com reference | : Book 56, Hadith 18 |
| USC-MSA web (English) reference | : Book 56, Hadith 18 |
| Arabic reference | : Book 56, Hadith 1831 |