Verse 29

स्वयैव दुःखदायिन्या चेष्टया परिरोदिति ।काष्ठावष्टब्धवृषणः कीलोत्पाटी कपिर्यथा

In plain words

By its own sorrow-dealing activity (ceṣṭā) it wails bitterly — like the wedge-pulling monkey whose testicles are caught fast in the wood.