Manava Dharmashastra 5.116

5.116

ślokadvayaṃ śrutisiddhārthānuvādena dṛṣṭāntatayā neyam | grahacamasādīnāṃ yajñapātrāṇāṃ prayogāntare prayujyamānānāṃ pūrvaprayogalagnājyahavirlepādisaṃsargaparihārārthamuṣṇena vāriṇā lepādyapakarṣaḥ kartavyaḥ | tato yathāśruti kvacitpāṇinā kvaciddabhaiḥ kvacidṛśāpavitreṇa saṃmārgaḥ kartavyaḥ | iyaṃ prāyogikī śuddhiḥ | ucchiṣṭādyupaghāte tu laukikapātravat | 'na somenocchiṣṭā bhavantoti' viśeṣaśruteranyatropaghāte sāmānyaśuddhirastīti jñāyate | grahacamasasphyā yājñikebhya ākāraviśeṣeṣvāvasātavyāḥ |

Medhātithi’s commentary (manubhāṣya):
These two verses are to be taken as citing examples in illustration of what has been laid down in the Śruti.

When the cups, the spoons and other sacrificial vessels have been used in one performance, they become smeared with clarified butter and other offering-materials employed at that performance; and with a view to avoid the contamination of the fresh performance by such stains and smearings, these have to be removed by means of hot water; and this cleansing has to be done in the manner prescribed for each case: sometimes by hand, sometimes by kuśa-grass, sometimes by the threads at the end of one’s garment, and so on.

The purification here mentioned is in connection with sacrificial performances; in the event of the vessels becoming defiled with food-leavings etc., the cleaning is to be done in the same manner as in the case of ordinary vessels. In as much as we have the Vedic declaration—‘they do not become unclean by Soma’.—it is understood that in the case of other defilements, the ordinary purification is to be done.

The exact shapes of the ‘graha’ the ‘chamasa’ and the ‘sphya’ are to be ascertained from persons versed in sacrificial lore.—(115-116).