In conjunction with the words prasikta and utsuka 'greatly desirous of', the 3rd case-affix is used after the word, as well as the 7th.,
Ex. निद्रायां निद्रया वा उत्सुकः 'longing for sleep,' केशैः or केशेषु प्रसितः,
प्रसित-उत्सुकाभ्यां तृतीया च
Adhyāya 2 · Pāda 3 · Rule 44