During the reign of Svārociṣa, the post of Indra was assumed by Rocana, the son of Yajña. Tuṣita and others became the principal demigods, and Ūrja, Stambha and others became the seven saints. All of them were faithful devotees of the Lord.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तत्रेन्द्रो रोचनस्त्वासीद्देवाश्च तुषितादयः । ऊर्जस्तम्भादयः सप्त ऋषयो ब्रह्मवादिनः
tatrendro rocanastvāsīddevāśca tuṣitādayaḥ | ūrjastambhādayaḥ sapta ṛṣayo brahmavādinaḥ
SB 8.1.20