One verse

Srimad Bhagavatam 11.18.16

11.18.16

द‍ृष्टिपूतं न्यसेत् पादं वस्‍त्रपूतं पिबेज्जलम् । सत्यपूतां वदेद् वाचं मन:पूतं समाचरेत् ॥ १६ ॥

dṛṣṭi-pūtaṁ nyaset pādaṁ vastra-pūtaṁ pibej jalam satya-pūtāṁ vaded vācaṁ manaḥ-pūtaṁ samācaret

dṛṣṭi
by the sight
pūtam
ascertained as pure
nyaset
he should place
pādam
his foot
vastra
by his cloth
pūtam
filtered
pibet
he should drink
jalam
water
satya
by truthfulness
pūtām
pure
vadet
he should speak
vācam
words
manaḥ
ascertained by the mind
pūtam
to be pure
samācaret
he should perform

A saintly person should step or place his foot on the ground only after verifying with his eyes that there are no living creatures, such as insects, who might be injured by his foot. He should drink water only after filtering it through a portion of his cloth, and he should speak only words that possess the purity of truth. Similarly, he should perform only those activities his mind has carefully ascertained to be pure.