Bhagavatapurana 3.19.37

3.19.37

yo vai hiraṇyākṣa-vadhaṃ mahādbhutaṃ vikrīḍitaṃ kāraṇa-sūkarātmanaḥ /
śṛṇoti gāyaty anumodate 'ñjasā vimucyate brahma-vadhād api dvijāḥ //

37. O Brahmins, that man is completely absolved even from the sin of killing a brahmin, who listens to, sings, or rejoices in, this story of His marvellous deed of destroying Hiranyaksha, which was a sport of Hari, who appeared as Varaha for some (grand) purpose.