Arundhatī is also known as Ūrjā. She gave her husband Vasiṣṭha seven spotless spiritual sages named Citraketu, Suroci, Virajā, Mitra, Ulbaṇa, Vasubhṛdyāna, and Dyumān. Thus, when we apply our skills (vasiṣṭha) with great enthusiasm (ūrjā), the results are sure to be powerful (dyumān), helpful (vasubhṛdyāna), abundant (ulbaṇa), endearing (mitra), without defect (virajā), sparklingly beautiful (suroci) and illuminatingly clear (citraketu).
Arundhatī also gave Vasiṣṭha other sons, headed by Śakti. Thus, if we desire empowerment (śakti) we must apply our skills (vasiṣṭha) with great enthusiasm (ūrjā).
— Bhāgavata 4.1.40~41