During the reign of the third Manu, Pramada and other sons of Vasiṣṭha became the seven sages. The Satyas, Vedaśrutas and Bhadras became demigods, and Satyajit was selected to be Indra, the King of heaven.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वसिष्ठतनयाः सप्त ऋषयः प्रमदादयः । सत्या वेदश्रुता भद्रा देवा इन्द्रस्तु सत्यजित्
vasiṣṭhatanayāḥ sapta ṛṣayaḥ pramadādayaḥ | satyā vedaśrutā bhadrā devā indrastu satyajit
SB 8.1.24