Anandakanda 1.7.137

1.7.137

saptābde sūryavaddīptiṃ daśame siddhimelanam /
vaidyādharaṃ samāpnoti varṣe caikādaśe priye //

In the seventh year, [one gains] radiance like the sun; in the tenth, association with the Siddhas; / and in the eleventh year, my dear, one attains the state of a Vidyādhara;