yeṣāṁ saṁsmaraṇāt puṁsāṁ
sadyaḥ śudhyanti vai gṛhāḥ
kiṁ punar darśana-sparśa-
pāda-śaucāsanādibhiḥ
yeṣām - of whom; saṁsmaraṇāt - by remembrance; puṁsām - of persons; sadyaḥ - immediately; śudhyanti - become purified; vai - certainly; gṛhāḥ - the houses; kim punaḥ - what to speak of; darśana - by seeing; sparśa - touching; pāda-śauca - washing the feet; āsana-ādibhiḥ - by offering a seat and so on.
This is a quotation from Śrīmad-Bhāgavatam (1.19.33).