Verily, a believer can attain, by his good manners, the rank of one who fasts and prays often

The Prophet (may Allah's peace and blessings be upon him) points out that good manners enable one to reach the rank of a person who persistently fasts during the day and prays at night. The core of good manners is doing good, speaking good words, having a smiling face, and refraining from harming people and bearing harm from them.