Bhagavatapurana 5.25.4

5.25.4

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yasyāṅghri-kamala-yugalāruṇa-viśada-nakha-maṇi-ṣaṇḍa-maṇḍaleṣv ahi-patayaḥ saha sātvatarṣabhair ekānta-bhakti-yogenāvanamantaḥ sva-vadanāni parisphurat-kuṇḍala-prabhā-maṇḍita-gaṇḍa-sthalāny ati-manoharāṇi pramudita-manasaḥ khalu vilokayanti //

4. In the transparent sphere of the nails shining like rubies on His lotus-like feet, lordly serpents together with the great gods bent with intense devotion and with their heart full of joy see, as in a mirror, their own beautiful faces with cheeks rendered brilliant by the radiant ear-rings.