Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 15
Sanskrit:
ह्रादस्य धमनिर्भार्यासूत वातापिमिल्वलम् ।योऽगस्त्याय त्वतिथये पेचे वातापिमिल्वल: ॥ १५ ॥
ITRANS:
hrādasya dhamanir bhāryā-sūta vātāpim ilvalamyo ’gastyāya tv atithayepece vātāpim ilvalaḥ
Translation:
The wife of Hlāda was named Dhamani. She gave birth to two sons, named Vātāpi and Ilvala. When Agastya Muni became Ilvala’s guest, Ilvala served him a feast by cooking Vātāpi, who was in the shape of a ram.