Subāla Upaniṣad 3.p1

3.p1

asadvā idamagra āsīdajātamabhūtamapratiṣṭhita-maśabdamasparśamarūpamarasamagandhamavyayama-mahāntamabṛhantamajamātmānaṃ matvā dhīro na śocati ||

"At first, there was Asaṭ, unborn, non-existent, unsupported, soundless, touchless, formless, tasteless, odourless, and decayless. The undaunted man never grieves, as he knows Āṭmā to be great, all-pervading and unborn. It (Āṭma) is prāṇaless, mouthless, earless, tongueless, manas-less, ṭejas-less, eyeless, nameless, goṭraless (or clanless), headless, handless, feetless, non-unctuous, bloodless, non-measurable, neither long nor short, neither gross nor atomic, neither great nor small, endless, indescribable, nonreturnable, non-luminous, not hidden, having neither inside nor outside, neither eating anything nor being eaten by others. Some one (out of many) attains to this (Āṭmā) by the six means of saṭya (truth), ḍāna (charity), ṭapas (religious austerities), non-injury to any creature, celibacy and complete indifference to worldy objects; and there are no other means. Whoever feels happy with the thought 'I know That', that learned person's prāṇa will never get out of his body at the moment of death, but will become absorbed in Brahman; and being absorbed in Brahman, he attains the state of Brahman Itself as he who knows this."