Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 16
Sanskrit:
राज्ञां ब्रह्मप्रसूतानां वंश त्रैकालिकोऽन्वय: ।वंशानुचरितं तेषां वृत्तं वंशधराश्च ये ॥ १६ ॥
ITRANS:
rājñāṁ brahma-prasūtānāṁvaṁśas trai-kāliko ’nvayaḥvaṁśānucaritaṁ teṣāṁvṛttaṁ vaṁśa-dharās ca ye
Translation:
Dynasties are lines of kings originating with Lord Brahmā and extending continuously through past, present and future. The accounts of such dynasties, especially of their most prominent members, constitute the subject of dynastic history.