Mahabharata — Anushasana Parva, Shloka 12
Pratyakṣa–Āgama–Ācāra: Doubt, Proof, and the Practice of Dharma (प्रत्यक्ष–आगम–आचारविचारः)
वे वायु अथवा जल पीकर रहें। सेवारका भोजन करें। पत्थरसे अन्न या फलको कूँचकर खायाँ अथवा दाँतोंसे चबाकर ही भक्षण करें। सम्प्रक्षालके नियमसे रहें अर्थात् दूसरे दिनके लिये आहार संग्रह करके न रखें ।।
vāyuṃ athavā jalaṃ pītvā tiṣṭheyur; sevāraka-bhojanaṃ kuryuḥ; pāṣāṇena annaṃ phalaṃ vā kuṭṭayitvā khādeyuḥ athavā dantair eva carvitvā bhakṣayeyuḥ; samprakṣālaka-niyamena tiṣṭheyur, arthāt dvitīya-dināya āhāra-saṃgrahaṃ na kuryuḥ. cīra-valkala-saṃvītair mṛga-carma-nivāsibhiḥ kāryā yātrā yathā-kālaṃ yathā-dharmaṃ yathā-vidhi.
大自在天说道：“让他们或饮风、或饮水而自持，或只取因服侍而得之物。让他们食谷食果，必先以石碾碎；否则便仅以齿嚼而食。让他们遵守‘三摩钵罗叉罗迦（samprakṣālaka）’之戒——即不为次日储粮。身披破布与树皮，以鹿皮覆体，他们应当只在适当之时出行——如朝礼圣地——为护持法（dharma），并依照所规定的仪轨而行。”
श्रीमहेश्वर उवाच
Educational Q&A
The verse teaches rigorous ascetic restraint: minimal and regulated intake, avoidance of storing food, simple clothing, and undertaking travel (especially pilgrimage) only when timely and dharmically justified, following proper rules.
Śrī Maheśvara is instructing on the conduct of renunciants/ascetics—how they should eat, avoid hoarding, dress in austere garments, and travel for sacred purposes in a disciplined, rule-governed manner.