Shiva Purana
पयोव्रतोऽभवन्मासम्मासं शाकफलाशनः ॥ मासम्मुष्टितिलाहारो मासं पानीयभोजनः ॥ ३३ ॥
He observed a vow of milk and ate vegetables and fruits for a month He ate a handful of sesame seeds for a month and water for a month.
english translation
payovrato'bhavanmAsammAsaM zAkaphalAzanaH ॥ mAsammuSTitilAhAro mAsaM pAnIyabhojanaH ॥ 33 ॥
hk transliteration by Sanscript