CHĀNDOGYA UPANISHAD · 5.1.1
यो ह वै ज्येष्ठं च श्रेष्ठं च वेद ज्येष्ठश् च ह वै श्रेष्ठश् च भवति ।
प्राणो वाव ज्येष्ठश् च श्रेष्ठश् च ॥
yo ha vai jyeṣṭhaṃ ca śreṣṭhaṃ ca veda jyeṣṭhaś ca ha vai śreṣṭhaś ca bhavati ।
prāṇo vāva jyeṣṭhaś ca śreṣṭhaś ca ॥
He who knows the oldest and the best becomes himself the oldest and the best. Breath indeed is the oldest and the best.
F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)