Bhagavatapurana 8.23.28

28. O good son of Kuru race, I have told thee all this in relation to the work of the most powerful Lord, which removes the sin of those that listen to it.

29. He who presumes to sing exhaustively the glories of the Almighty Lord is like unto a mortal who would reckon all the particles of the earth (dust); therefore the Rishi who has a direct revelation of the Mantra says “No mortal already born or born now (or one that will ever be born) could make approaches to Thy glory.