SB 5.20.20
tasminn api praiyavrato ghrtaprstho namadhipatih sve dvipe varsani sapta vibhajya tesu putra-namasu
sapta rikthadan varsapan nivesya svayam bhagavan bhagavatah parama-kalyana-yasasa atma-bhutasya
hares caranaravindam upajagama.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The ruler of this island was another son of Maharaja Priyavrata. His name was Ghrtaprstha, and he was a very learned scholar. He also divided his own island among his seven sons. After dividing the island into seven parts, named according to the names of his sons, Ghrtaprstha Maharaja completely retired from family life and took shelter at the lotus feet of the Lord, the soul of all souls, who has all auspicious qualities. Thus he attained perfection.