Manava Dharmashastra 4.46

4.46

cityāṃ agnyarthe iṣṭakākūṭe | parvatagrahaṇaṃ araṇyodyānopalakṣaṇārtham | tathāhi viśeṣa-pratiṣedho bhaviṣyati “parvatamastaka iti” | sāmānyena ca pratiṣedhe parvatavāsināmamehanaprasaṅgaḥ | valmīkaḥ kṛmikṛto mṛttikāsañcayaḥ |

Medhātithi’s commentary (manubhāṣya):
‘Oven’—a structure of bricks, for the depositing of fire. ‘Mountain’—here stands for forests and gardens; as the mountain-top is going to be specifically forbidden (in the next verse). If the word were really meant to stand for the mountain itself, and the prohibition applied to the mountain as a whole, then people living on the mountains would have to go without passing urine at all.

‘Ant-hill’—the mound of earth set up by insects.—(46)