Maitri (Maitrāyaṇīya) Upaniṣad 7.6

7.6

śanirāhuketuragarakṣoyakṣanaravihagaśarabhebhādayo'dhastādudyanti tapanti varṣanti stuvanti punarviśanti antarvivareṇekṣanti yaḥ prājño vidharaṇaḥ sarvāntaro'kṣaraḥ śuddhaḥ pūtaḥ bhāntaḥ kṣāntaḥ śāntaḥ ||

6. Śani (Saturn), Rāhu (the Dragon’s Head), Ketu (the Dragon’s Tail), serpents, the Rākshasas (ogres), the Yakshas (sprites), men, birds, deer, elephants, and the like issue forth below. They shine, they rain, they praise, they enter again within and peer through an opening.

. . . . He who is intelligent, the avenger, within all, imperishable, pure, clean, shining, patient, tranquil.