Bhagavatapurana 1.5.10

1.5.10

na yadvacaścitrapadaṃ hareryaśo jagatpavitraṃ pragṛṇīta karhicit /
tadvāyasaṃ tīrtham uśanti mānasā na yatra haṃsā niramantyuśikkṣayāḥ //

10. That composition (work) which, endowed as it may be with all the graces of rhetoric, does not loudly (fully) sing the praises of Sri Hari's glory which purifies the Universe, is considered a source of amusement only to worldly men, and in that work Paramahamsas of devout heart dwelling always upon the blissful Lord do not find delight, just as royal swans living in the midst of noble lotus beds, cannot find delight in the pools, however good in themselves, where crows alone find delight.