Valmiki Ramayana Yuddha Kanda Sarga 61 Shloka 21
Original Shlokaएवंप्रजायदित्वेषभक्षयिष्यतिनित्यशः । अचिरेणैवकालेनशून्योलोकोभविष्यति ।।6.61.21।।
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एषः if he, एवम् in that way, नित्यशः every day, प्रजाः created beings, भक्षयिष्यतियदि if consumes, अचिरेण soon, कालेनैव in course of time, लोकः world, शून्यः empty, भविष्यति will become.
"If he consumes created beings every day like that, in the course of time the world will be devoid of beings."