Verse 13

वहवस्तुल्यकालं च प्रतिभासेन कर्मणाम् ।जना यतन्ते स्वफलपाकेऽतिबहुलाकृतौ

In plain words

And so, at one and the same time, many people, through the appearing of their karmas, strive toward the ripening of their own fruit -- a ripening manifold beyond measure in form.