Skandapurana 5.198.127

5.198.127

aṣṭavarṣā bhavedgaurī navavarṣā ca rohiṇī ..
daśavarṣā bhavetkanyā ata ūrdhvaṃ rajasvalā .. 127 ..

‘At eight years she is Gaurī, and at nine years she is Rohiṇī; / at ten years she is a maiden (kanyā), and beyond that she is a menstruating woman (rajasvalā).