Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 30
Sanskrit:
पुत्रं कृत्वा शुन:शेफं देवरातं च भार्गवम् ।आजीगर्तं सुतानाह ज्येष्ठ एष प्रकल्प्यताम् ॥ ३० ॥
ITRANS:
putraṁ kṛtvā śunaḥśephaṁdevarātaṁ ca bhārgavamājīgartaṁ sutān āhajyeṣṭha eṣa prakalpyatām
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.