CHĀNDOGYA UPANISHAD · 5.1.4
यो ह वै संपदं वेद सं हास्मै कामाः पद्यन्ते दैवाश् च मानुषाश् च ।
श्रोत्रं वाव संपत् ॥
yo ha vai saṃpadaṃ veda saṃ hāsmai kāmāḥ padyante daivāś ca mānuṣāś ca ।
śrotraṃ vāva saṃpat ॥
He who knows success, his wishes succeed, both his divine and human wishes. The ear indeed is success.
F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)