Manava Dharmashastra 6.17

6.17

agninā pakvaṃ śākaudanādi, tadaśanaṃ yasya so'gnipakvāśanaḥ | ‘kāle svayameva yatpakvaṃ tadeva bhuñjīta vārkṣaṃ phalam |
athavā dhānyānāmeva nīvārādīnāṃ niṣpiṣyedaṃ bhakṣaṇam | aśmabhiḥ pāṣāṇaiḥ kuṭṭayitvā piṣṭarūpaṃ kṛtvā bhuñjīta | yadvā yaddatūpapannaṃ vṛntakādibhirbahistuṣakapāṭakaṃ tadaśmabhirapanīya kavāṭamantaḥphalaṃ bhakṣayet |
dantā ulūkhalaṃ asya dantolūkhalikaḥ| dantaistuṣakavāṭamapanīya bhakṣayet | aśvatyapi saṃskāre sa na kartavyaḥ | yadi vā pūrvavadaśanaviśeṣopalakṣaṇam—‘tādṛśamaśnīyādyadasya dantā eva ulūkhalakāryamavaghātaṃ saṃpādayanti’ |

Medhātithi’s commentary (manubhāṣya):
‘One living on food cooked by fire’.—One whose food consists of vegetables and rice &c. cooked by fire.

Or he may rat only such fruits of trees as ripen themselves in their season.

Or his food may consist of flour obtained by grinding nīvāra and other grains. That is, he should grind these grains, and having thus turned them into dough, eat. it.

Or this phrase may mean that those nuts that ripen in their own season, and which have a kernel beneath a hard crust,—the outer crust of these should be broken with stone and the inner kernel eaten.

‘Dantolūkhalikaḥ’.—One who has his teeth for the mortar. That is the outer crust of nuts may be removed with the teeth. This however ought not to be done even though the nut may have been cleaned.

Or the phrase may be taken as qualifying the eating; the sense being that—‘he shall eat in such a way that his teeth may serve the purposes of the mortar, in the thumping and removing of chaff’.—(17).