श्रीभगवानुवाच ।स्थैर्यं देहस्य दृष्टस्य जीवितं प्रोच्यते जनैः ।देहान्तरार्थं देहस्य संत्यागो मरणं स्मृतम्
In plain words
The Blessed Lord said: People call the steadiness of this visible body “life”; and the giving up of a body for the sake of another body is what is remembered as “death.”