Shiva Purana
कायस्सुगंधधूपाद्यैर्य न्नेनापि सुसंस्कृतः ॥ न जहाति स्वभावं स श्वपुच्छमिव नामितम्॥ ११॥
Inspite of being smeared and sanctified assiduously by sweet scents, incense and other things the body does not eschew its nature like the curved tail of a dog.
english translation
kAyassugaMdhadhUpAdyairya nnenApi susaMskRtaH ॥ na jahAti svabhAvaM sa zvapucchamiva nAmitam॥ 11॥
hk transliteration by Sanscript