Soap in literature

‘What wonderful soap they make!’ he said, examining and unwrapping a cake of scented soap Agatha Mikhaylovna had prepared for the visitor, but which Oblonsky had not used. ‘Just look, it is quite a work of art.’

‘Yes, yes, there are all sorts of improvements in everything now,’ said Oblonsky with a moist and beautiful yawn.

Leo Tolstoy, Anna Karenina, trans Louise & Aylmer Maude