Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 23
Sanskrit:
सप्तद्वीपाधिपतयो नृपा वैन्यगयादय: ।अर्थै: कामैर्गता नान्तं तृष्णाया इति न: श्रुतम् ॥ २३ ॥
ITRANS:
sapta-dvīpādhipatayonṛpā vaiṇya-gayādayaḥarthaiḥ kāmair gatā nāntaṁtṛṣṇāyā iti naḥ śrutam
Translation:
We have heard that although powerful kings like Mahārāja Pṛthu and Mahārāja Gaya achieved proprietorship over the seven dvīpas, they could not achieve satisfaction or find the end of their ambitions.