"Malik related to me that Safwan ibn Sulaym said, "The Messenger of Allah, may Allah bless him and grant him peace, was asked, 'Can a believer be a coward?' He said, 'Yes.' He was asked, 'Can a believer be a miser?' He replied, 'Yes.' He was asked, 'Can a believer be a liar?' He said, 'No.'""