Thereafter, when the time was ripe, when Sudyumna, the king of the world, was sufficiently old, he delivered the entire kingdom to his son Purūravā and entered the forest.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
ततः परिणते काले प्रतिष्ठानपतिः प्रभुः । पुरूरवस उत्सृज्य गां पुत्राय गतो वनम्
tataḥ pariṇate kāle pratiṣṭhānapatiḥ prabhuḥ | purūravasa utsṛjya gāṃ putrāya gato vanam
SB 9.1.42