PRAŚNA UPANISHAD · 4.4

यदुच्छ्वासनिःश्वासावेतावाहुती समं नयतीति स समानः । मनो ह
वाव यजमानः । इष्टफलमेवोदानः । स एनं यजमानमहरहर्ब्रह्म
गमयति ॥ ४.४॥

yaducchvāsaniḥśvāsāvetāvāhutī samaṃ nayatīti sa samānaḥ । mano ha
vāva yajamānaḥ । iṣṭaphalamevodānaḥ । sa enaṃ yajamānamaharaharbrahma
gamayati ॥ 4.4॥

“But the medial breath is the priest, the sacrificant; for he equaliseth the offering of the inbreath and the offering of the outbreath. The Mind is the giver of the sacrifice and the upper breath is the fruit of the sacrifice, for it taketh the sacrificer day by day into the presence of the Eternal.

Sri Aurobindo · CWSA 18, p. 185