ॐ | यो ह वै ज्येष्ठं च श्रेष्ठं च वेद, ज्येष्ठं च श्रेष्ठं च भवति, प्राणो वाव ज्येष्ठश्च श्रेष्ठश्च || He/she who knows the oldest and the best becomes himself/herself the oldest and the best. Prana (Life Energy) indeed is the oldest and the best.