साधवः क्षीणदोषास्तु सच्छब्दः साधुवाचकः ।
तेषामाचरणं यत्तु सदाचारः स उच्यते ॥
sādhavaḥ kṣīṇa-doṣās tu sac-chabdaḥ sādhu-vācakaḥ |
teṣām ācaraṇaṁ yat tu sad-ācāraḥ sa ucyate ||
(Viṣṇu Purāṇa; cited in Hari-bhakti-vilāsa: 3.12)
“Sādhus are those who are free from faults, and the word ‘sat’ is a signifier of a sādhu. Their conduct is called sadācāra (proper conduct).”