Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 37
Sanskrit:
यावत् सूर्य उदेति स्म यावच्च प्रतितिष्ठति ।तत् सर्वं यौवनाश्वस्य मान्धातु: क्षेत्रमुच्यते ॥ ३७ ॥
ITRANS:
yāvat sūrya udeti smayāvac ca pratitiṣṭhatitat sarvaṁ yauvanāśvasyamāndhātuḥ kṣetram ucyate
Translation:
All places, from where the sun rises on the horizon, shining brilliantly, to where the sun sets, are known as the possession of the celebrated Māndhātā, the son of Yuvanāśva.