Verse 19

अन्तः सुप्ता स्थिता मन्दा यत्र बीज इवाङ्कुरः ।वासना तत्सुषुप्तत्वं विद्धि जन्मप्रदं पुनः

In plain words

Where vāsanā lies asleep within, faint and dim, as the sprout lies hidden in the seed -- know that state of sleep as one that gives birth once more.