Manava Dharmashastra 6.46

6.46

cakṣuṣā mārga nirūpya yasminpradeśe prāṇinaḥ pīḍāṃ na gacchanti tatra pādaṃ nidadhyāt | satyāṃ vācaṃ vadediti siddhe pūtagrahaṇaṃ satyaśabdasyopalakṣaṇatāṃ darśayati | tenāpaviddhaṃ bhavati | manasā pūto manaḥpūtaḥ sadā syāt | paradravyābhidhyānādi na kuryāt |

He shall place his foot sight-purified, drink water cloth-clarified, utter speech truth-sanctified and act with pure mind—(46).

Medhātithi’s commentary (manubhāṣya):
Having looked over the path with the eye, he should place his foot on a spot where there may be no animals to suffer from his tread.

It being already known that one should tell the truth, the term ‘pūta’, ‘sanctified’, is meant to show that the term ‘satya’, ‘truth’, is purely indicative; hence there is nothing incongruous in this.

One shall always remain pure in his mind; i.e. he shall not even think of possessing what belongs to another and so forth.—(46)

This verse is quoted in Aparārka (p. 953);—and in Parāśaramādhava (Ācāra, p. 569).

Comparative notes by various authors
Baudhāyana (2.11.25, 24).—‘He shall perform the necessary purifications with water which has been taken out and has been strained. He shall carry a cloth for straining water for the sake of purifications.’

Do. (2-17.43).—‘He shall not sip water which has not been drawn up, which has not been strained and which has not been thoroughly cleansed.’

Do. (2.18.2).—‘Abstention from injuring living beings, truthfulness, abstention from appropriating the property of others, continence and liberality.’

Viṣṇu (96.14-17).—‘He must set down his feet purified by looking down: he must drink water purified (by straining) with a cloth; he must utter speech purified by truth; ho must perform acts purified by his mind.’