BṚHADĀRAṆYAKA UPANISHAD · 6.1.2

यो ह वै वसिष्ठां वेद वसिष्ठः स्वानां भवति ।
वाग् वै वसिष्ठा ।
वसिष्ठः स्वानां भवति ।
अपि च येषां बुभूषति ।
य एवं वेद ॥

yo ha vai vasiṣṭhāṃ veda vasiṣṭhaḥ svānāṃ bhavati ।
vāg vai vasiṣṭhā ।
vasiṣṭhaḥ svānāṃ bhavati ।
api ca yeṣāṃ bubhūṣati ।
ya evaṃ veda ॥

He who knows the richest, becomes himself the richest among his people. Speech is the richest. He who knows this, becomes the richest among his people, and among whomsoever he wishes to be so.