SB 9.16.30

putraṁ kṛtvā śunaḥśephaṁ
 devarātaṁ ca bhārgavam
ājīgartaṁ sutān āha
 jyeṣṭha eṣa prakalpyatām
Word for word: 
putram — a son; kṛtvā — accepting; śunaḥśepham — whose name was Śunaḥśepha; devarātam — Devarāta, whose life was saved by the demigods; ca — also; bhārgavam — born in the Bhṛgu dynasty; ājīgartam — the son of Ajīgarta; sutān — to his own sons; āha — ordered; jyeṣṭhaḥ — the eldest; eṣaḥ — Śunaḥśepha; prakalpyatām — accept as such.
Translation: 
Viśvāmitra accepted the son of Ajīgarta known as Śunaḥśepha, who was born in the Bhṛgu dynasty and was also known as Devarāta, as one of his own sons. Viśvāmitra ordered his other sons to accept Śunaḥśepha as their eldest brother.