Bhagwad Gita
Chapter 2, Verse 11
श्री भगवानुवाच
अशोच्यानन्वशोचस्त्वं प्रज्ञावादांश्च भाषसे।
गतासूनगतासूंश्च नानुशोचन्ति पण्डिताः।।2.11।।
The Blessed Lord said: While speaking learned words, you are mourning for what is not worthy of grief. Those who are wise lament neither for the living nor the dead.