Naavan challay teerthee man khotai tan chor
Ik bhaa-o lathee naati-aa du-ay bhaa charhee-as hor
Baahar dhotee toomrhee andar vis nikor
Saadh bhalay annaati-aa chor se choraa chor
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Reference: Aakhya Baba Nanak Ne, Editor Shafqat Tanvir Mirza
English Translation
They go and bath at sacred shrines of pilgrimage, but their minds are still evil, and their filth is washed off by these baths, but they only accumulate twice as much. Like a gourd, they may be washed off on the outside, but on the inside, they are still filled with poison. The holy man is blessed, even without such bathing, while a thief is a thief, no matter how much he bathes.
Translation: S. S. Khalsa