Verily the scribe (angel) on the left (the recorder of bad deeds) raises the pen for six hours from the Muslim servant who sins. If he regrets his action and seeks Allaah's forgiveness, it is ignored; otherwise, it is written as one bad deed.

 
 [Tabrani Mujam kabeer 7765, Sahih by Albani in Sahih Al Jami 2097 also authenticated by Al Haythami in Majma Zawaid 17575.]