BṚHADĀRAṆYAKA UPANISHAD · 3.7.19

यः श्रोत्रे तिष्ठञ् छ्रोत्राद् अन्तरो यं श्रोत्रं न वेद यस्य श्रोत्रं शरीरं यः श्रोत्रम् अन्तरो यमयत्य् एष त आत्मान्तर्याम्य् अमृतः ॥

yaḥ śrotre tiṣṭhañ chrotrād antaro yaṃ śrotraṃ na veda yasya śrotraṃ śarīraṃ yaḥ śrotram antaro yamayaty eṣa ta ātmāntaryāmy amṛtaḥ ॥

'He who dwells in the ear, and within the ear, whom the ear does not know, whose body the ear is, and who pulls (rules) the ear within, he is thy Self, the puller (ruler) within, the immortal.'

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)