In Ramayana, the words, Mangal Bhavan Amangal Hari (मंगल भवन अमंगल हारी) is said by Lord Shiva to Mata Parvati when she asked him to tell her the story of Ramayana.
The meaning of Mangal Bhavan amangal Hari is “That which brings in the auspicious and takes away the inauspicious”.