Verse 19

उत्पत्तिप्रौढिमासाद्य कलना हृदयान्तरे ।स्वमनोरूपिणी तस्य हृद्येवानुबभूव सा

In plain words

Within his heart that kalanā, having reached the full ripeness of its arising and taking the form of his own mind, experienced, in his very heart —