Garudapurana 2.49.127

2.49.127

bhajata jitahṛṣīkāḥ kṛṣṇamenaṃ munīśaṃ samajani bata yasmādgīḥ sudhāsāradhārā /
pṛṣatamapi yadīyaṃ varṇarūpaṃ nipīya śrutipuṭaculukena prāpnuyādātmanaikyam //

With senses conquered, worship this Kṛṣṇa, the Lord of Sages, from whom, ah, arose the stream of speech like a torrent of nectar, / having drunk even a single drop of which, in the form of syllables, with the cupped hollow of the ear, one may attain unity with the Self.