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."
Muwatta Malik Book 56, Hadith 18
← Previous Hadith Malik related to me that he heard that someone said to Luqman, "What has brought you to what we see?" meaning his high rank. Luqman said, "Truthful speech, fulfilling the trust, and leaving what does not concern me."

Muwatta Malik Book 56, Hadith 17 Next Hadith → Malik related to me that Safwan ibn Sulaym said, "The Messenger of Allah, may Allah bless him and grant him peace, was asked, 'Can the mumin be a coward?' He said, 'Yes.' He was asked, 'Can the mumin be a miser?' He said, 'Yes.' He was asked, 'Can the mumin be a liar?' He said, 'No.' "

Muwatta Malik Book 56, Hadith 19