Mahabharata 13.111.7

13.111.7

rajastamaḥ sattvamatho yeṣāṃ nirdhautamātmanaḥ |
śaucāśauce na te saktāḥ svakāryaparimārgiṇaḥ || 7 ||

Those persons from whose souls the attributes of Sattwa and Rajas and Tamas have been washed off, they who, regardless of (external) purity and impurity pursue the ends they have proposed to themselves, they who have renounced everything, they who are possessed of omniscience and endued with universal sight, and they who are of pure conduct, are regarded as Tirthas possessing the power of cleansing. That man whose limbs only are wet with water is not regarded as one that is washed. He, on the other hand, is regarded as washed who has washed himself by self-denial. Even such a person is said to be pure both inwardly and outwardly. They who never concern themselves with what is past, they who feel no attachment to acquisitions that are present, indeed, they who are free from desire, are said to be possessed of the highest purity. Knowledge is said to constitute the especial purity of the body. So also freedom from desire, and cheerfulness of mind. Purity of conduct constitutes the purity of the mind. The purity that one attains by ablutions in sacred waters is regarded as inferior. Verily, that purity which arises from knowledge, is regarded as the best. Those ablutions which one performs with a blazing mind in the waters of the knowledge of Brahma in the Tirtha called Manasa, are the true ablutions of those that are conversant with Truth.