|Canto 9: Liberation||Chapter 8: The Sons of Sagara Meet Lord Kapiladeva|
Bhaktivedanta VedaBase: Śrīmad Bhāgavatam 9.8.14
yo 'samañjasa ity uktaḥ
sa keśinyā nṛpātmajaḥ
tasya putro 'ḿśumān nāma
yaḥ — one of the sons of Sagara Mahārāja; asamañjasaḥ — whose name was Asamañjasa; iti — as such; uktaḥ — known; saḥ — he; keśinyāḥ — in the womb of Keśinī, the other queen of Sagara Mahārāja; nṛpa-ātmajaḥ — the son of the King; tasya — of him (Asamañjasa); putraḥ — the son; aḿśumān nāma — was known as Aḿśumān; pitāmaha-hite — in doing good for his grandfather, Sagara Mahārāja; rataḥ — always engaged.
Among the sons of Sagara Mahārāja was one named Asamañjasa, who was born from the King's second wife, Keśinī. The son of Asamañjasa was known as Aḿśumān, and he was always engaged in working for the good of Sagara Mahārāja, his grandfather.
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His Divine Grace A. C. Bhaktivedanta Swami Prabhupāda, Founder Ācārya of the International Society for Krishna Consciousness