Manava Dharmashastra 5.134

5.134

viṇmūtrotsargānantaraṃ meḍhrasya śuddhayarthamekā mṛddātavyā vāmena | smṛtyantare śuddhividhānādyāvatī tasminhaste yāti tāvatī sodakā grahītavyā | ahaṃ tu bruve, arthavaditivacanenoktameva parimāṇam | kecit paṭhanti "prathamā prasṛtirjñeyā dvitīyā tu tadardhikā | tṛtīyā mṛttikā jñeyā tribhāgakarapūraṇe |" etacca parimāṇaṃ pāyāveva | anyatra tvarthavaditi | ekotsarge'pīyatyeva saṃkhyā | āvṛttividhānaṃ cedam | mṛdāṃ bhedo gavāvivat | tathā cātrocyate "valmīkāddūratarādaśvasthānāccānyetyādi |" evamiha sitā kṛṣṇā lohitetyādyapi nādaraṇīyam | abhīpsatā icchateti |

Medhātithi’s commentary (manubhāṣya):
After the passing of urine and faeces, for the cleansing of the urinary organ, earth should be applied to it once.

In another Smṛti it has been laid down that one should take as much earth mixed with water as can be contained in one hand. What I assert is that in view of what has been said regarding the using of as much earth and water as may be necessary, the proper quantity would be what is stated in the present text. Some people quote, in this connection, the following saying—‘The hand bring filled up, the first (and largest) measure of it is called Prasṛti, the second is half of it; and the third part of it is called mṛttikā.’ But this measure applies to the case of anus-cleansing only. In all other cases, as much is to be used as may be necessary.

In the case of a single evacuation also, the number of applications is to be as here prescribed; and what is prescribed is the repetition of the act (of rubbing and washing).

There is a distinction among the various kinds of ‘earth’, just as there is among the various kinds of the ‘cow’ and other things. In present connection, for instance, it has been declared that ‘earth should be got from a place far removed from an ant-hill, us also from the stables’ and so forth. No account need be taken however of the distinction into ‘white’, ‘black’, ‘red’ and so forth.

‘Who desires’—who wishes.—(134).