Praśna Upaniṣad ("Six Questions") 4.4

4.4

yaducchvāsaniḥśvāsāvetāvāhutīsamaṃ nayatīti sa samānaḥ
mano ha vāva yajamāna iṣṭaphalamevodānaḥ sa enaṃ yajamānamaharaharbrahma gamayati

4. The equalizing breath (samāna) is so called because it "equalizes" (samaṁ nayati) the two oblations: the in-breathing and the out-breathing (ucchvāsa-niḥśvāsa). The mind, verily, indeed, is the sacrificer. The fruit of the sacrifice is the up-breath (udāna). It leads the sacrificer to Brahma day by day.

4.4.p1

atraiṣa devaḥ svapne mahimānamanubhavati

5. There, in sleep, that god experiences greatness. Whatever object has been seen, he sees again; whatever has been heard, he hears again. That which has been severally experienced in different places and regions, he severally experiences again and again. Both what has been seen and what has not been seen, both what has been heard and what has not been heard, both what has been experienced and what has not been experienced, both the real (sat) and the unreal (a-sat)—he sees all. He sees it, himself being all.

4.4.p2

yaddṛṣṭaṃ dṛṣṭamanupaśyati śrutaṃ śrutamevārthamanuśṛṇoti deśadigantaraiśca pratyanubhūtaṃ