Dashashantayah 8.124

Daśaśāntayaḥ 8.124

śrotram
śrotrasyāpyāyanaṃ ceṣṭaṃ mantrāṇāṃ śravaṇaṃ yataḥ
gurubhyo'śrutamantrāṇāṃ na vīryamavakalpate