Pūrvacitti gave birth to these nine sons, one each year, but after they grew up she left them at home and again approached Lord Brahmā to worship him.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सा सूत्वाथ सुतान् नवानुवत्सरं गृह एवापहाय पूर्वचित्तिर्भूय एवाजं देवमुपतस्थे
sā sūtvātha sutān navānuvatsaraṃ gṛha evāpahāya pūrvacittirbhūya evājaṃ devamupatasthe
SB 5.2.20