Concept of Infinite in Ancient India from īśopaniṣad

The Isha Upanishad (īśa upaniṣad, otherwise Ishopanishad īśopaniṣad or īśāvāsya upaniṣad) is one of the shortest of the Upanishads, consisting of 17 or 18 verses in total; like other core texts of the vedanta, it is considered revealed scripture (Śruti) by diverse traditions within Hinduism. The name of the text derives from the incipit, īśā, "by the Lord (Isha)". The Upanishad appears in the final chapter (adhyāya) of the Shukla Yajurveda, but is historically one of the latest of the principal (mukhya) Upanishads, dating approximately to Mauryan times.

The short text covers a wide spectrum of philosophy, religion, ritualism and metaphysics.

Read Translation here:
Translation by Rishi Aurobindo