Vishnupurana 4.10.20

4.10.20

parāśara uvāca:
pūroḥ sakāśād ādāya jarāṃ dattvā ca yauvanam
rājye 'bhiṣicya pūruṃ ca prayayau tapase vanam //

Having made this determination, Yayáti restored his youth to Puru, resumed his own decrepitude, installed his youngest son in the sovereignty, and departed to the wood of penance (Tapovana). To Turvasu he consigned the south-east districts of his kingdom; the west to Druhyu; the south to Yadu; and the north to Anu; to govern as viceroys under their younger brother Puru, whom he appointed supreme monarch of the earth.