पूर्वं गृहीत्वा कर्णाभ्यां स्फुरन्ती परिनिश्चयम् ।जराजर्जरमार्जारी यौवनाखुं निकृन्तति
In plain words
Having first seized it by the ears, quivering and with settled resolve, the cat that is decrepit old age tears apart the mouse that is youth.
पूर्वं गृहीत्वा कर्णाभ्यां स्फुरन्ती परिनिश्चयम् ।जराजर्जरमार्जारी यौवनाखुं निकृन्तति
Having first seized it by the ears, quivering and with settled resolve, the cat that is decrepit old age tears apart the mouse that is youth.