Srimad Bhagavatam Canto 10, Chapter 20, Text 13

SB 10.20.13

jala-sthalaukasah sarve
abibhran ruciram rupam
 yatha hari-nisevaya
As all creatures of the land and water took advantage of the newly fallen rainwater, their forms became attractive and pleasing, just as a devotee becomes beautiful by engaging in the service of the Supreme Lord.
Srila Prabhupada comments as follows: “We have practical experience of this with our students in the International Society for Krishna Consciousness. Before becoming students, they were dirty-looking, although they had naturally beautiful personal features; but due to having no information of Krsna consciousness they appeared very dirty and wretched. Since they have taken to Krsna consciousness, their health has improved, and by their following the rules and regulations their bodily luster has increased. When they are dressed with saffron-colored cloth, with tilaka on their foreheads and beads in their hands and on their necks, they look exactly as if they have come directly from Vaikuntha.”
Srimad Bhagavatam Canto 10, Chapter 20, Text 12
Srimad Bhagavatam Canto 10, Chapter 20, Text 14