What are the Sunnahs of leaving Majlis

What are the Sunnahs of leaving Majlis?

 After assembly read to clear the mistakes-

  Meaning: 'O Allah!  You are far removed from all imperfections (You are pure) and I praise You.  I bear witness that there is no god worthy of worship but You.  I seek Your forgiveness and return to You.

 A Muslim gathers in many majlis day and night, viz.
 When you talk to others while eating,
 Be sure to talk when you see your neighbor or friend.
 When with your colleagues at work, school, study,
 When you talk to kids and wives together,
 When you are traveling, during public lectures or private studies etc.

  Notice how many times you can mention this dua day and night and keep your relationship with Allah.  The benefit of implementing this Sunnah is that the mistakes and sins committed in speaking in that meeting will be expunged.
  Ibn al-Qayyim said that the gathering of Muslims in Majlis is of two types-
 Social gatherings are held to pass the time.  The benefits are limited and it pollutes the heart and wastes time.  The majlis which are held for giving the advice of truth.  It is of immense value and most beneficial.