Shiva Purana

siva.sh/siva-purana/rudra-samhita/85/49

आहारे त्यक्तपर्णाभूद्यस्माद्धिमवतः सुतः ।। तेन देवैरपर्णेति कथिता नामतः शिवा।।४९।।

sanskrit

Since she, the daughter of Himavat, eschewed leaves from her diet she was called Aparṇā by the gods.

english translation

AhAre tyaktaparNAbhUdyasmAddhimavataH sutaH || tena devairaparNeti kathitA nAmataH zivA||49||

hk transliteration by Sanscript