Srimad Bhagavatam Canto-04, Chapter-01, Text-40-41
urjayam jajñire putra
vasisthasya parantapa
citraketu-pradhanas te
sapta brahmarsayo ’malah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The great sage Vasistha begot in his wife, Urja [sometimes called Arundhati], seven spotlessly great sages, headed by the sage named Citraketu.
SB 4.1.41
citraketuh surocis ca
viraja mitra eva ca
ulbano vasubhrdyano
dyuman sakty-adayo ’pare
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The names of these seven sages are as follows: Citraketu, Suroci, Viraja, Mitra, Ulbana, Vasubhrdyana and Dyuman. Some other very competent sons were born from Vasistha’s other wife.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Urja, who is sometimes known as Arundhati and was the wife of Vasistha, was the ninth daughter of Kardama Muni.
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