Wikipedia
Dashakumaracharita (The narrative of ten young men, IAST: Daśa-kumāra-carita, Devanagari: दशकुमारचरित) is a prose romance in Sanskrit, attributed to Dandin (दण्डी), believed to have flourished in the seventh to eighth centuries CE. However, there is some obscurity surrounding its textual tradition, the identity of the author and the date of composition.
It describes the adventures of ten young men, the Kumaras, all of whom are either princes or sons of royal ministers, as narrated by the men themselves (however, there are irregularities in the text). These narratives are replete with accounts of demigods, ghosts, prostitutes, gamblers, intrigues with voluptuous women, astonishing coincidences, cockfights, anthropophagy, sorcery, robberies, murders and wars. The reader is treated to some very striking passages; for instance, a seductive young girl (all of whose anatomical features are very frankly described) deftly prepares a fragrant meal of rice-gruel and vegetables for her prospective suitor in the sixth chapter of the Dashakumaracharita.
The text contains a specimen of lipogrammatic writing (a species of constrained writing). At the beginning of the seventh chapter of the Dashakumaracharita, Mantragupta is called upon to relate his adventures. However, during the previous night of vigorous lovemaking, his lips have been nibbled several times by his beloved; as a result they are now swollen, making it painful for him to close them. Thus, throughout his narrative, he is compelled to refrain from using any labial consonants (प,फ,ब,भ,म).