The Mukhya Upaniṣads

Kauṣītaki · Adhyāya 4 · Kauṣītaki 4.1

Passage 7

स होवाच बालाकिर्य एवैष वायौ पुरुषस्तमेवाहमुपास इति तं होवाचाजातशत्रुर्मा मैतस्मिन्समवादयिष्ठा इन्द्रो वैकुण्ठोऽपराजिता सेनेति वा अहमेतमुपास इति स यो हैतमेवमुपास्ते ।जिष्णुर्ह वापराजिष्णुरन्यतस्यजायी भवति ॥ ७ ॥

In plain words

Bālāki said, "The person who is in the wind — him indeed I worship." Ajātaśatru said to him, "Do not draw me into talk about him. I worship him as Indra Vaikuṇṭha, the unconquered army." He who worships him thus becomes victorious, unconquerable, a conqueror of others.