Shloka 253
Adhyāya 42 — Mahābhūta–Indriya–Adhyātma-Vyavasthā
Brahmā’s Instruction on Elements and Faculties
अधिकभूतं विसर्गश्न मित्रस्तत्राधिदेवतम् निम्न गतिवाला अपान एवं गुदा अध्यात्म कहा गया है और मलत्याग उसका अधिभूत तथा मित्र उसके अधिदेवता हैं
adhikabhūtaṃ visargaś ca mitras tatrādhidevatam | nimnagativālā apāna evaṃ gudā adhyātma ucyate ca | malatyāgaḥ tad adhikabhūtaṃ mitras tasyādhidevatā ||
ヴァーユ神は言った。「この働きにおいて、外への排出（排泄）がアディブータ（adhibhūta、粗大なる身体相）であり、ミトラ（Mitra）がそのアディデーヴァター（adhidevatā、統御する神）である。」下方へと動く生命気流はアパーナ（Apāna）と呼ばれ、その内なる座（adhyātma）は肛門であると言われる。ゆえに、汚穢を捨て去る行為は身体に現れる相であり、ミトラはその秩序を司り守護する神として立つ。
वायुदेव उवाच
Educational Q&A
The verse maps a bodily function to a threefold framework: the physical act (adhibhūta), the presiding divine principle (adhidevatā), and the inner seat in the body-mind system (adhyātma). It teaches that even ordinary physiological processes are governed by cosmic order and should be understood with reverence and discipline.
Vāyu-deva is explaining a doctrinal classification of vital functions, identifying Apāna as the downward-moving life-current, locating its adhyātma seat in the guda (anus), and naming Mitra as the adhidevatā connected with the regulation of this eliminative process.