Hold forth 

i) In the meeting, she held forth on the shortcomings of the plan but she did not suggest any point to make it better.

ii) He left the room while Mark was holding forth on incompetent staff members and unorganized departments in office.

iii) David was holding forth on the benefits of investing money in share and stock market.

iv) Some confidential documents have been kept in this box so we should not hold forth this box for long distance.