The son of Nikumbha was Bahulāśva, the son of Bahulāśva was Kṛśāśva, the son of Kṛśāśva was Senajit, and the son of Senajit was Yuvanāśva. Yuvanāśva had no sons, and thus he retired from family life and went to the forest.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
बर्हणाश्वो निकुम्भस्य कृशाश्वोऽथास्य सेनजित् । युवनाश्वोऽभवत्तस्य सोऽनपत्यो वनं गतः
barhaṇāśvo nikumbhasya kṛśāśvo'thāsya senajit | yuvanāśvo'bhavattasya so'napatyo vanaṃ gataḥ
SB 9.6.25