SB 12.10.23
na hy am-mayani tirthani
na devas cetanojjhitah
te punanty uru-kalena
yuyam darsana-matratah
Translation:
Mere bodies of water do not constitute holy places, nor are lifeless statues of the demigods actual worshipable deities. Because external vision fails to appreciate the higher essence of the holy rivers and the demigods, these purify only after a considerable time. But devotees like you purify immediately, just by being seen.