Originally Posted by WarChild

I remember reading a bunch about Islam and I want to see if I have this correct. Please correct me if I don't.

The Qur'an is the word of Allah, carried to man by the Prophet Muhammed.

There is another body of writings that describes behaviours, acts and speakings of the prophet, that were not direct commands from Allah. These are more a long the lines of "The Prophet Muhammed wrote always with his left hand, and thus we can assume the righteous of god will write always with their left hand.". Is this true? What is this body of writings called?